Q_Id int64 337 49.3M | CreationDate stringlengths 23 23 | Users Score int64 -42 1.15k | Other int64 0 1 | Python Basics and Environment int64 0 1 | System Administration and DevOps int64 0 1 | Tags stringlengths 6 105 | A_Id int64 518 72.5M | AnswerCount int64 1 64 | is_accepted bool 2
classes | Web Development int64 0 1 | GUI and Desktop Applications int64 0 1 | Answer stringlengths 6 11.6k | Available Count int64 1 31 | Q_Score int64 0 6.79k | Data Science and Machine Learning int64 0 1 | Question stringlengths 15 29k | Title stringlengths 11 150 | Score float64 -1 1.2 | Database and SQL int64 0 1 | Networking and APIs int64 0 1 | ViewCount int64 8 6.81M |
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41,200,785 | 2016-12-17T16:40:00.000 | -1 | 0 | 1 | 0 | python,nlp,nltk,spacy | 44,993,090 | 2 | false | 0 | 0 | Go through the spacy 2.0 nightly build. It should have the solution you're looking for. | 1 | 2 | 0 | Using Python Spacy, how to extract entity from simple passive voice sentence? In the follow sentence, my intention is to extract both "John” from the sentence as nsubjpass and .ent_.
sentence = "John was accused of crimes by David" | Extract entities from Simple passive voice sentence by Python Spacy | -0.099668 | 0 | 0 | 1,693 |
41,208,473 | 2016-12-18T12:48:00.000 | 0 | 0 | 0 | 0 | python,django,cron,serial-port | 41,216,333 | 1 | false | 1 | 0 | For detecting system shutdown compare time stamps of last reading taken to current reading's time stamp. If they differ by more than 15 minutes than something went wrong during the operation. | 1 | 0 | 0 | The application should read data from a serial port every 15 minutes (using the Modbus Protocol) and put them into a database. The data can then be viewed and manipulated in a web interface. I'm using Windows (no server) with a RAID system to prevent data loss.
My current setup looks like this:
using pyserial and mini... | Python reliable project setup: write data from a serial port to a database in a certain time interval | 0 | 1 | 0 | 120 |
41,211,357 | 2016-12-18T18:10:00.000 | 0 | 1 | 0 | 0 | python,testing,settings | 41,211,379 | 2 | false | 1 | 0 | I suppose the easiest way would be to move your settings.py to another folder for safekeeping and then make a new one, and edit that for debugging. | 1 | 1 | 0 | I have my project settings in settings.py file. There are database names, user names, host names etc. defined there. In project files I do import settings and then use the constants where needed like settings.HOST. For unit testing I would like to use different settings. How should I override the settings? I am not usi... | Override settings.py for testing | 0 | 0 | 0 | 431 |
41,212,272 | 2016-12-18T19:55:00.000 | 4 | 0 | 0 | 1 | python,etl,google-cloud-dataflow | 41,229,251 | 1 | true | 0 | 0 | Yes, this can absolutely be done. Right now, it's a little klutzy at the beginning, but upcoming work on a new primitive called SplittableDoFn should make this pattern much easier in the future.
Start by using Create to make a dummy PCollection with a single element.
Process that PCollection with a DoFn that download... | 1 | 0 | 0 | So I am having a bit of a issue with the concepts behind Dataflow. Especially regarding the way the pipelines are supposed to be structured.
I am trying to consume an external API that delivers an index XML file with links to separate XML files. Once I have the contents of all the XML files I need to split those up in... | Google Cloud Dataflow consume external source | 1.2 | 0 | 1 | 614 |
41,215,036 | 2016-12-19T02:32:00.000 | 2 | 1 | 0 | 0 | python,apache,flask,mod-wsgi | 41,215,183 | 1 | true | 1 | 0 | I would not run the web server as root for security reasons.
Instead, I suggest to:
Add the web user to /etc/sudoers - no password. Ideally, only allow the commands you want to run as root.
run the command with sudo [command]
You mention deployment, if you are packaging this into an rpm, I would put the sudo defini... | 1 | 3 | 0 | I host a flask web app on a Raspberry Pi that has controls for my LED light strip. It all works great when I run the server with python as the root user, but I am having difficulty deploying it with Apache mod_wsgi. I want to use htttps, so deploying it seems to be necessary, but Apache doesn't seem to allow running se... | Deploying a Flask app with root privileges | 1.2 | 0 | 0 | 4,412 |
41,215,169 | 2016-12-19T02:55:00.000 | 1 | 0 | 0 | 0 | python,machine-learning,scikit-learn,cross-validation,grid-search | 41,252,942 | 1 | false | 0 | 0 | Try setting the random seed if you want to get the same result each time. | 1 | 1 | 1 | I am performing parameter selection using GridSearchCv (sklearn package in python) where the model is an Elastic Net with a Logistic loss (i.e a logistic regression with L1- and L2- norm regularization penalties). I am using SGDClassifier to implement this model. There are two parameters I am interested in searching th... | Why does GridSearchCV give different optimums on repeated runs? | 0.197375 | 0 | 0 | 907 |
41,217,464 | 2016-12-19T07:11:00.000 | -1 | 1 | 0 | 0 | python,c++,linux,ipc | 41,218,658 | 3 | false | 0 | 0 | you can combine both applications memory with tools like swig.
also you can use namedpipe | 1 | 0 | 0 | What is the fast enough way (about 40~50Hz) to send large data (RGB image data: 320*240*3) from c++ process to python process (and small size of float data from python to c++) on Linux? Note: the two processes are running at the same PC.
I have tried:
UDP
shared memory
For UDP:
The message to be sent is larger than t... | How to send LARGE data from c++ to python in a fast way on Linux? | -0.066568 | 0 | 0 | 899 |
41,219,281 | 2016-12-19T09:19:00.000 | 4 | 0 | 0 | 0 | python,django,django-views | 41,219,364 | 1 | false | 1 | 0 | Django doesn't do anything at all. It is entirely up to the server, which has already determined (according to its configuration) whether to run Django in multiple processes and/or threads, and so distributes incoming requests among those. | 1 | 1 | 0 | Let we say two users access the same urls that lead two requests were send to django views. The question is, how does django deal with these two requests? Does them be handled in two different threads simultaneously or when one end it request-middleware-response life cycle then the other be handled? | Django view execution order for same url pattern requests? | 0.664037 | 0 | 0 | 64 |
41,219,491 | 2016-12-19T09:31:00.000 | 1 | 1 | 0 | 0 | python,git,twitter | 41,219,615 | 2 | false | 0 | 0 | Yes, anyone can see the old files in version history in git-hub free version. If you want to make your project secure, you have to pay for private repository in github.
If you dont wana pay, follow what @Stijin suggested. | 1 | 0 | 0 | I'm working on a project mainly for a bit of fun.
I set up a twitter account and wrote a python script to write tweets.
Initially i hard-coded the twitter credentials for my app into my script (tweet.py)
Now i want to share the project so i have removed my app's credentials from tweet.py and added them to a config file... | Git security - private information in previous commits | 0.099668 | 0 | 1 | 36 |
41,221,779 | 2016-12-19T11:39:00.000 | -1 | 0 | 0 | 0 | python,pelican | 41,222,267 | 4 | false | 0 | 0 | Probably is not the answer you are looking for, but if you are already customizing the CSS, think about usgin CSS to hide the section. | 2 | 1 | 0 | When generating content using Pelican, everything is Ok except that I see in the footer "Proudly powered by Pelican ..."
I want to get rid of it. I know I can remove it from the generated files manually, but that is tedious.
Is there a way to prevent the generation of the above phrase by asking Pelican to do that for ... | how to automatically remove "Powered by ..." in Pelican CMS? | -0.049958 | 0 | 0 | 1,230 |
41,221,779 | 2016-12-19T11:39:00.000 | 3 | 0 | 0 | 0 | python,pelican | 47,449,423 | 4 | false | 0 | 0 | In your theme template, there will be a line like,
{% extends "!simple/base.html" %}
This base.html is used as the foundation for creating the theme. This file is available in : %PYTHON%\Lib\site-packages\pelican\themes\simple\templates
You can edit this file to remove the "Powered By.." | 2 | 1 | 0 | When generating content using Pelican, everything is Ok except that I see in the footer "Proudly powered by Pelican ..."
I want to get rid of it. I know I can remove it from the generated files manually, but that is tedious.
Is there a way to prevent the generation of the above phrase by asking Pelican to do that for ... | how to automatically remove "Powered by ..." in Pelican CMS? | 0.148885 | 0 | 0 | 1,230 |
41,227,982 | 2016-12-19T17:31:00.000 | 0 | 1 | 0 | 1 | macos,python-2.7,amazon-elastic-beanstalk | 41,230,657 | 1 | true | 0 | 0 | The tilde character wasn't being expanded within the double-quoted string. If you had tried to execute "~/Library/Python/2.7/bin/eb" --version in your second example it wouldn't have worked either.
You could have set your path using something like export PATH="/Users/peter/Library/Python/2.7/bin:$PATH", or potentially ... | 1 | 0 | 0 | I am trying to add the Python 2.7 bin folder to my path in order to run elastic beanstalk. Here is some output from my Terminal:
➜ ~ echo $PATH
~/Library/Python/2.7/bin:/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin
➜ ~ ~/Library/Python/2.7/bin/eb --version
EB CLI 3.8.9 (Python 2.7.1)
➜ ~ eb --version
zsh: command not... | I am having issues adding Python folder to my path | 1.2 | 0 | 0 | 106 |
41,228,983 | 2016-12-19T18:42:00.000 | 0 | 0 | 1 | 0 | python,ubuntu,tensorflow,pip,ipython | 41,230,349 | 2 | false | 0 | 0 | Each major version of python has its own site-packages directory. It seems that you have both python 3.4 and 3.5 and you have jupyter installed in 3.5 and tensorflow in 3.4. The easy solution is to install tensorflow in 3.5 as well. This should allow you to use it with the 3.5 notebook kernel. You could attempt to add ... | 2 | 0 | 1 | I have been running in circles trying to get tensorflow to work in a jupyter notebook. I installed it via pip on ubuntu and also tried a conda environment (but unless I'm mistaken, getting that to work with ipython is beyond my ability). Tensorflow works fine in python3.4, but not python 3.5, which is used when I load ... | can import tensorflow in python 3.4 but not in ipython notebook | 0 | 0 | 0 | 255 |
41,228,983 | 2016-12-19T18:42:00.000 | 0 | 0 | 1 | 0 | python,ubuntu,tensorflow,pip,ipython | 50,797,957 | 2 | false | 0 | 0 | The best way to setup tensorflow with jupyter
1.Install anaconda
2.Create a environment named "tensorflow"
3.activate that environment by the following command in command prompt
Install anaconda
Create a environment named "Tensorflow"
activate that environment by the following command in command prompt
activate tensor... | 2 | 0 | 1 | I have been running in circles trying to get tensorflow to work in a jupyter notebook. I installed it via pip on ubuntu and also tried a conda environment (but unless I'm mistaken, getting that to work with ipython is beyond my ability). Tensorflow works fine in python3.4, but not python 3.5, which is used when I load ... | can import tensorflow in python 3.4 but not in ipython notebook | 0 | 0 | 0 | 255 |
41,233,635 | 2016-12-20T01:33:00.000 | 2 | 0 | 1 | 0 | python,parallel-processing,tensorflow,distributed-computing | 60,222,616 | 3 | false | 0 | 0 | Tensorflow 2.0 Compatible Answer: If we want to execute in Graph Mode of Tensorflow Version 2.0, the function in which we can configure inter_op_parallelism_threads and intra_op_parallelism_threads is
tf.compat.v1.ConfigProto. | 1 | 86 | 1 | Can somebody please explain the following TensorFlow terms
inter_op_parallelism_threads
intra_op_parallelism_threads
or, please, provide links to the right source of explanation.
I have conducted a few tests by changing the parameters, but the results have not been consistent to arrive at a conclusion. | Meaning of inter_op_parallelism_threads and intra_op_parallelism_threads | 0.132549 | 0 | 0 | 54,304 |
41,234,380 | 2016-12-20T03:22:00.000 | 0 | 0 | 0 | 0 | python,opencv,computer-vision,simplecv | 41,242,570 | 1 | false | 0 | 0 | What I am trying to say is that, consider you want to perform blob detection for a certain region of interest (ROI) on an image, but you also want to keep the image.
ZdaR's comment helps if you want that ROI area alone.
My suggestion would be:
Create a binary mask of the contour region you want to perform blob detecti... | 1 | 0 | 0 | I'm working on a project where I want to run simple blob detection, but only on areas inside a contour. I know contours can return bounding rectangles or circles, but I don't see how to limit a simple blob detection to the area inside that contour.
Any thoughts? I'm stuck. | How can I force simpleblobdetection to only search inside a contour area? | 0 | 0 | 0 | 88 |
41,235,051 | 2016-12-20T04:46:00.000 | 0 | 0 | 0 | 0 | python,mysql,apache-spark,pyspark | 41,235,443 | 1 | true | 0 | 0 | I find a solution:
add &sessionVariables=sql_mode='NO_UNSIGNED_SUBTRACTION' to jdbc url. | 1 | 0 | 0 | I want to change mysql's sql_mode to 'NO_UNSIGNED_SUBTRACTION' , when using pyspark. Is there any way? | Is there any way to set mysql's sql_mode in pyspark? | 1.2 | 1 | 0 | 156 |
41,235,497 | 2016-12-20T05:31:00.000 | 0 | 0 | 1 | 0 | python,shell | 54,035,064 | 1 | false | 0 | 0 | I just want to print the last line.
To print a line repeatedly, just override the line ending \n by giving the keyword argument end='\r' to print(). | 1 | 1 | 0 | I am trying to build a game.
The game will have an item called a "pulsating crystal" (I am using \033[1;31;40m] to change the items colour), I want to it to be rainbow, so it keeps changing colours, without deleting everything else in the terminal. I used print(\033c) to clear the terminal but I just want to print the ... | Removing printed lines in Python 3 | 0 | 0 | 0 | 61 |
41,240,754 | 2016-12-20T11:01:00.000 | 0 | 0 | 0 | 0 | windows,python-2.7,import,permissions,administrator | 41,244,020 | 3 | false | 0 | 0 | You should either use virtualenv as stated before or set the proper permissions to the site-packages folder. I should be in C:\Python27\Lib. | 1 | 2 | 0 | I'm struggling with some strange issues in Python 2.7. I wrote a very long tool where I import different modules, which I had to install first using pip. The tool is to be shared within the company, where different users have different rights on their specific machines.
The problem occurred when another user logged int... | Why can I import certain modules in Python only with administrator rights? | 0 | 0 | 0 | 4,340 |
41,243,944 | 2016-12-20T13:51:00.000 | 1 | 0 | 1 | 0 | python,pyc | 41,243,973 | 2 | false | 0 | 0 | .pyc files contain byte code, which is what the Python interpreter compiles the source to. This code is then executed by Python's virtual machine.
Python's documentation explains the definition like this:
Python is an interpreted language, as opposed to a compiled one,
though the distinction can be blurry because of... | 2 | 0 | 0 | I have a test case for an algorithm, which gives a different result after the first execution.
The test imports the algorithm and the test data from two files.
The first execution returns the correct results and creates a .pyc file for the test data file.
The second and all following executions return incorrect results... | Why does the existence of .pyc file change the result of my code? | 0.099668 | 0 | 0 | 1,456 |
41,243,944 | 2016-12-20T13:51:00.000 | 0 | 0 | 1 | 0 | python,pyc | 49,460,261 | 2 | false | 0 | 0 | One thing I found that changes is the value of file (.pyc vs .py), which tripped me up writing a utility invoking stack traces. | 2 | 0 | 0 | I have a test case for an algorithm, which gives a different result after the first execution.
The test imports the algorithm and the test data from two files.
The first execution returns the correct results and creates a .pyc file for the test data file.
The second and all following executions return incorrect results... | Why does the existence of .pyc file change the result of my code? | 0 | 0 | 0 | 1,456 |
41,246,248 | 2016-12-20T15:50:00.000 | 1 | 0 | 0 | 0 | python,django,module,connection,access-denied | 41,260,630 | 1 | true | 1 | 0 | I find an answer for the first part of my question. I just used the import login_required. Just before the function homepage in /helpdesk/public.py and the function index in /helpdesk/kb.py, I put @login_required(login_url='/helpdesk/login/?next=/helpdesk/) and it worked !
Now I try to find the answer of the second par... | 1 | 0 | 0 | I'm working on the Helpdesk module from Django.
I want people who try to access 192.168.x.xxx:8000/helpdesk/ are redirected to the login page: 192.168.x.xxx:8000/helpdesk/login/?next=/helpdesk/
I also want people who try to access an nonexistant page to be redirected to:
the homepage if connected, or
the login page i... | Redirects in Django | 1.2 | 0 | 0 | 46 |
41,249,703 | 2016-12-20T19:18:00.000 | -2 | 0 | 1 | 0 | python,c++,cython | 41,251,029 | 1 | false | 0 | 1 | Thank you Maverick for your question.
Cython is not a way of using C++ classes into python.Cython is simply python with c data types.Means that you can use c data types in your python program which in turn turns your python code to execute faster.Also you can build extensions in python using cython.
Now comming to the ... | 1 | 0 | 0 | I have a C++ project that invokes the same function in each python script. But each script does very different things that need access to the C++ project's internal classes.
So I need a python wrapper so I pass a C++ object to the python script and I need a way to run the python script's function from the C++ project ... | Compile python scripts with C++ project | -0.379949 | 0 | 0 | 115 |
41,250,358 | 2016-12-20T20:00:00.000 | 1 | 0 | 1 | 0 | python | 41,250,667 | 2 | true | 0 | 0 | If you used the newer syntax supported by 2.7, e.g. around exceptions, and/or, better yet, worked with new features imported from __future__, you'll have much easier time converting your code to Python 3 (up to no changes at all). I'd suggest to follow this path first, for it can be trod gradually, without an abrupt ju... | 1 | 1 | 0 | I'd like to upgrade to python 3.5, but I use legacy python 2.7 packages. Is it easy to run legacy packages in python 3.5? I have been under the impression that this isn't easy, but I did a few searches to see if I'm wrong and didn't come up with much.
I would expect there to be a multiprocessing package that allows sta... | Can we run legacy python 2.7 code under python 3.5? | 1.2 | 0 | 0 | 526 |
41,251,298 | 2016-12-20T21:09:00.000 | 1 | 0 | 1 | 0 | python,multithreading,cpu-usage | 41,251,390 | 2 | false | 0 | 0 | For multi-core applications you should use the multiprocessing module instead of threading. Python has some (well documented) performance issues with threads. Search google for Global Interpreter Lock for more information about Python and thread performance | 1 | 0 | 0 | I'm running a computation heavy program in Python that takes about 10 minutes to run on my system. When I look at CPU usage, one of eight cores is hovering at about 70%, a second is at about 20%, and the rest are close to 0%.Is there any way I can force the program into 100% usage of a single core?
edit: I recognize t... | Controlling CPU Usage and Threading In Python | 0.099668 | 0 | 0 | 3,451 |
41,252,907 | 2016-12-20T23:33:00.000 | 0 | 0 | 0 | 0 | python,excel,openpyxl | 43,180,932 | 1 | false | 0 | 0 | As far as i know, openpyxl does not allow you to access only one cell, or a limited number of cells for that matter. In order to access any information in a given worksheet, openpyxl will create one in the memory. This is the reason for which you will be unable to add a Sheet without opening the entire document in memo... | 1 | 0 | 0 | I want to generate excel spreadsheets by python, the first few tabs are exactly same, all are refer to the last page, so how to insert the last page by openpyxl? because the first few tabs are too complex so load_workbook is always failed, is there have any other way to insert tabs without loading? | How to use openpyxl to insert one sheet to a template? | 0 | 1 | 0 | 198 |
41,253,187 | 2016-12-21T00:05:00.000 | 1 | 0 | 0 | 1 | google-app-engine,google-app-engine-python | 41,268,471 | 2 | false | 1 | 0 | If you are using the standard environment, the answer is no, you can't really inspect or see the code directly. You've mentioned looking at it via Stackdriver Debugger, which is one way to see a representation of it.
It sounds like if you have a reason to be looking at the code, then someone in your organization should... | 1 | 5 | 0 | (Background: I am new to Google App Engine, familiar with other cloud providers' services)
I am looking for access/view similar to shell access to production node.
With a Python/Django based Google App Engine App, I would like to view the code in production.
One view I could find is the StackDriver 'Debug' view.
Howe... | Accessing Google App Engine Python App code in production | 0.099668 | 0 | 0 | 1,805 |
41,253,846 | 2016-12-21T01:36:00.000 | 2 | 0 | 1 | 0 | python,multithreading | 41,253,895 | 2 | false | 0 | 0 | The global interpreter lock (in cpython) is a measure put in place so that only one active python thread executes at the same time. As frustrating as it can be, this is a good thing because it is put in place to avoid interpreter corruption.
When a blocking operation is encountered, the current thread yields the lock ... | 2 | 0 | 0 | Newbie on Python and multiple threading.
I read some articles on what is blocking and non-blocking I/O, and the main difference seems to be the case that blocking I/O only allows tasks to be executed sequentially, while non-blocking I/O allows multiple tasks to be executed concurrently.
If that's the case, how blocking... | Blocking I/O in Python | 0.197375 | 0 | 0 | 1,343 |
41,253,846 | 2016-12-21T01:36:00.000 | 3 | 0 | 1 | 0 | python,multithreading | 41,253,876 | 2 | false | 0 | 0 | Blocking I/O blocks the thread it's running in, not the whole process. (at least in this context, and on a standard PC)
Multithreading is not affected by definition - only current thread gets blocked. | 2 | 0 | 0 | Newbie on Python and multiple threading.
I read some articles on what is blocking and non-blocking I/O, and the main difference seems to be the case that blocking I/O only allows tasks to be executed sequentially, while non-blocking I/O allows multiple tasks to be executed concurrently.
If that's the case, how blocking... | Blocking I/O in Python | 0.291313 | 0 | 0 | 1,343 |
41,254,715 | 2016-12-21T03:40:00.000 | 1 | 0 | 1 | 0 | python,rabbitmq,mqtt,bottle,hivemq | 41,259,154 | 1 | true | 0 | 0 | I'm not familiar with bottle but a quick look at the docs it doesn't look like there is any other way to start it's event loop apart from with the run() function.
Paho provides a loop_start() which will kick off it's own background thread to run the MQTT network event loop.
Given there looks to be no way to run the bot... | 1 | 1 | 0 | I am a noob to web and mqtt programming, I am working on a python application that uses mqtt (via hivemq or rabbitmq broker) and also needs to implement http rest api for clients.
I realized using python bottle framework is pretty easy to provide a simple http server, however both bottle and mqtt have their event loop,... | Using http and mqtt together in a single threaded python app | 1.2 | 0 | 1 | 544 |
41,254,869 | 2016-12-21T04:00:00.000 | 6 | 0 | 0 | 0 | python,django | 41,256,129 | 2 | true | 1 | 0 | Better to reset the console frequently.
This is not a big problem but due to multiple terminals being not reset for long durations, such problem occurs. | 1 | 9 | 0 | I want to change my models in django
when I execute python manage.py makemigrations ,it asks a question:
Did you rename the demoapp.Myblog model to Blog? [y/N] y^M^M^M
that I input y and press Enter,but it adds ^M to the line
I've looked around and apparently but I've got no choices
can anybody tell me how to fix i... | django press Enter and it show ^M | 1.2 | 0 | 0 | 786 |
41,256,392 | 2016-12-21T06:22:00.000 | 0 | 1 | 0 | 0 | python,multithreading | 48,301,814 | 2 | false | 0 | 0 | Besides scheduling, I recommend using a preemptive OS, which is the only way to assure a fixed timebase. One free option is the Wind River Linux.
I would be grateful if someone could point other good free alternatives. | 1 | 0 | 0 | Currently I have written a PID controller (with pulse width modification) which sends the current temperature to a server each duty cycle. However, this is written in series and so there is a brief delay between each cycle which makes the temperature control less effective.
Furthermore it is hard to terminate the tempe... | How to deal with delays when using Python for control systems | 0 | 0 | 0 | 57 |
41,257,336 | 2016-12-21T07:29:00.000 | 11 | 0 | 0 | 0 | python,python-2.7,opencv,opencv3.1,connected-components | 41,257,567 | 1 | false | 0 | 0 | Let us analyze it:
Assertion failed (L.channels() == 1 && I.channels() == 1)
The images that you are passing to some function should be 1 channel (gray not color).
__extractPlantArea(plant_img)
That happened in your code exactly at the function called __extractPlantArea.
cv2.connectedComponentsWithStats
While you... | 1 | 1 | 1 | I got the following error in OpenCV (python) and have googled a lot but have not been able to resolve.
I would be grateful if anyone could provide me with some clue.
OpenCV Error: Assertion failed (L.channels() == 1 && I.channels() == 1)
in connectedComponents_sub1, file /home/snoopy/opencv-
3.1.0/modules/... | OpenCV Error: Assertion failed (L.channels() == 1 && I.channels() == 1) in connectedComponents_sub1 | 1 | 0 | 0 | 9,922 |
41,258,141 | 2016-12-21T08:20:00.000 | 1 | 0 | 0 | 0 | python-2.7,nfc,pyinstaller | 41,260,740 | 1 | false | 0 | 0 | finally, found a solution, I need to import ['nfc.clf.acr122'] as hidden-input. | 1 | 0 | 0 | I am working on project that reads near field communication card and identifies the card user, I am using nfcpy with python 2.7, my nfc card reader is acr122 by ACS and I am working on windows 10. The application seems to be working fine when I run the python script. However, when I convert the python script to .exe u... | nfcpy python 2.7 pyinstaller | 0.197375 | 0 | 0 | 257 |
41,259,308 | 2016-12-21T09:30:00.000 | 2 | 1 | 0 | 1 | python,unit-testing,jenkins,environment-variables,tox | 41,262,440 | 1 | true | 0 | 0 | I thought about a workaround:
Create a build step in Jenkins job, that will execute bash script, that will open the tox.ini find line [testenv] and input one line below passenv = HTTP_PROXY HTTPS_PROXY. That would solve the problem. I am working on this right now but anyway if You guys know a better solution please le... | 1 | 2 | 0 | I am trying to run python unit tests in jenkins using tox's virtualenv. I am behind a proxy so I need to pass HTTP_PROXY and HTTPS_PROXY to tox, else it has problems with downloading stuff.
I found out that I can edit tox.ini and add passenv=HTTP_PROXY HTTPS_PROXY under [testenv], and than using the Create/Update Text ... | How to add passenv to tox.ini without editing the file but by running tox in virtualenv shell nature script in Jenkins behind proxy (python) | 1.2 | 0 | 0 | 1,397 |
41,263,383 | 2016-12-21T12:59:00.000 | 0 | 0 | 0 | 0 | python,sqlite,cursor | 41,485,462 | 1 | false | 0 | 0 | The close() method allows you to close a cursor object before it is garbage collected.
The connection's execute() method is exactly the same as conn.cursor().execute(...), so the return value is the only reference to the temporary cursor object. When you just ignore it, CPython will garbage-collect the object immediate... | 1 | 1 | 0 | Is closing a cursor needed when the shortcut conn.execute is used in place of an explicitly named cursor in SQLite? If so how is this done? Also, is closing a cursor only need for SELECT, when a recordset is returned, or is it also needed for UPDATE, etc.? | How does closing SQLite cursor apply when conn.execute is used in place of named cursor | 0 | 1 | 0 | 127 |
41,266,019 | 2016-12-21T15:12:00.000 | 0 | 0 | 1 | 0 | python,nlp,text-classification,data-cleaning | 41,266,971 | 1 | false | 0 | 0 | Must the regular expression allows something __abc__? If not, (\b_[a-zA-Z]+\s)|(\s[a-zA-Z]+_\b)|(\s_[a-zA-Z]+_\b)
What problem do you solve? Do you prepare texts for classification etc.?
You have to distinguish mistakes and symbol sequences. There are some scientific ways to make this, for example comparison with corpo... | 1 | 0 | 0 | I needed help with a couple of things.. I am new to NLP and unstructured data cleaning.. can someone answer the following questions... Thanks
need help with regex to identify words like _male and female_ or more generic like _word and word_ or _something_something_something and get rid of the underscore that is presen... | What is the formal process of cleaning unstructured data | 0 | 0 | 0 | 574 |
41,266,569 | 2016-12-21T15:38:00.000 | 1 | 0 | 1 | 0 | python-2.7,web2py | 41,273,813 | 1 | true | 0 | 0 | As you seem to conclude, there isn't much reason to be sending requests back and forth to the server given that the server isn't generating any new data that isn't already held in the browser. Just do all the filtering directly in the browser.
If you did need to do some manipulation on the server, though, don't necessa... | 1 | 0 | 0 | I researched up and down and I'm not seeing any answers that I'm quite understanding so I thought to post my own question.
I building a web application (specifically in web2py but that shouldn't matter I don't believe) on Python 2.7 to be hosted on Windows.
I have a list of about 2000 items in a database table.
The use... | Python 2.7 list of dictionaries in memory between page trips | 1.2 | 0 | 0 | 35 |
41,268,863 | 2016-12-21T17:46:00.000 | -5 | 0 | 1 | 0 | python,setuptools,setup.py | 62,582,679 | 4 | false | 0 | 0 | This is a very good question. I was looking for an answer myself, but couldn't find one that satisfied me.
So after gaining some experience, here are some examples that can help better understand:
Suppose our package is foo and it integrates with a users package bar, extending it's functionality.
Our package foo cannot... | 1 | 80 | 0 | I am trying to understand the difference between extras_require() and install_requires() in setup.py but couldn't get it. Both are used for installing Python dependencies, but what's the difference between them? | Difference between extras_require() and install_requires() in setup.py? | -1 | 0 | 0 | 43,935 |
41,268,864 | 2016-12-21T17:46:00.000 | 0 | 0 | 1 | 0 | python,notepad++ | 41,268,898 | 1 | true | 0 | 0 | To change your tab you need to go in notepad ++ Menu Settings > Preferences... then select Tab Settings Then select python in the Tab Settings box and uncheck Use default value and check Replace by space.
If you want a more usefull IDE for Python, you might want to consider another ide. for example eclipse with the pyd... | 1 | 0 | 0 | Are there any plugin that can help writing Python program on Notepad++. Currently, I have to manually control the indentation. For example, I need to click the "space" four times to ensure the indentation is right. Thanks. | plugin for helping writing python program on notepad++ | 1.2 | 0 | 0 | 70 |
41,273,756 | 2016-12-21T23:47:00.000 | 0 | 0 | 0 | 0 | python,tensorflow | 41,295,384 | 1 | false | 0 | 0 | You should probably get the parallel execution of the first 5 iterations and the second 5 iterations. I can say for sure if you provide a code sample. | 1 | 0 | 1 | I don't exactly understand how the while_loop parallelization works. Suppose I have a TensorArray having 10 Tensors all of same shape. Now suppose the computations in the loop body for the first 5 Tensors are independent of the computations in the remaining 5 Tensors. Would TensorFlow run these two in parallel? Also if... | TensorFlow while_loop parallelization TensorArray | 0 | 0 | 0 | 558 |
41,276,039 | 2016-12-22T04:59:00.000 | 0 | 0 | 0 | 0 | python,nlp,nltk | 41,279,184 | 1 | true | 0 | 0 | I'm not sure if you can say that sentence splitting is harder than (word) tokenisation. But tokenisation depends on sentence splitting, so errors in sentence splitting will propagate to tokenisation. Therefore you'd want to have reliable sentence splitting, so that you don't have to make up for it in tokenisation. And ... | 1 | 0 | 1 | I am using NLTK in python. I understood that it uses regular expressions in its word tokenization functions, such as TreebankWordTokenizer.tokenize(), but it uses trained models (pickle files) for sentence tokenization. I don't understand why they don't use training for word tokenization? Does it imply that sentence to... | Why NLTK uses regular expressions for word tokenization, but training for sentence tokenization? | 1.2 | 0 | 0 | 198 |
41,277,033 | 2016-12-22T06:31:00.000 | -2 | 0 | 0 | 0 | python,gtk,kivy,chromium-embedded,cefpython | 41,285,599 | 1 | false | 0 | 1 | another way you can implement another toolkit or framework in kivy is by using Threads,,i tried that with tkinter and it worked | 1 | 2 | 0 | I am building a Kivy application that makes use of the cefpython widget for kivy.
Upon execution of my program, whenever I add a Text Input widget into the view, my application crashes with the error : Gtk-ERROR **: GTK+ 2.x symbols detected. Using GTK+ 2.x and GTK+ 3 in the same process is not supported
I'm in a fix a... | Gtk-ERROR **: GTK+ 2.x symbols detected. Using GTK+ 2.x and GTK+ 3 in the same process is not supported (Kivy Application) | -0.379949 | 0 | 0 | 1,223 |
41,279,547 | 2016-12-22T09:17:00.000 | 7 | 0 | 1 | 0 | python,django,web-applications,web | 41,279,917 | 6 | true | 1 | 0 | Well, this is one of the most common questions among beginners. I, myself have faced the question and did build multiple projects without worrying about the virtual environment.
But, of late, I have realized the importance of using virtual environments. Some of the benefits of using virtual environments are:
Dependenc... | 4 | 8 | 0 | I'm currently a novice in web programming. I've been working on this Django project lately, and I've been reading about virtual environments. At the start of my project, I was unable to set up a virtual environment, and so I proceeded with the project without it. My questions are
Whether or not this virtual environment... | Virtual Environment for Python Django | 1.2 | 0 | 0 | 15,405 |
41,279,547 | 2016-12-22T09:17:00.000 | 0 | 0 | 1 | 0 | python,django,web-applications,web | 58,122,857 | 6 | false | 1 | 0 | first we create virtual wrapper
pip install virtualenv wrapper-win
and after make wrapper environment now
create a virtual env-
mkvirtualenv envname
(command run only 64 bit python)
And if you want to start virtual env then set your workplace(Directory)
using Command Prompt and write command
workon envname | 4 | 8 | 0 | I'm currently a novice in web programming. I've been working on this Django project lately, and I've been reading about virtual environments. At the start of my project, I was unable to set up a virtual environment, and so I proceeded with the project without it. My questions are
Whether or not this virtual environment... | Virtual Environment for Python Django | 0 | 0 | 0 | 15,405 |
41,279,547 | 2016-12-22T09:17:00.000 | 0 | 0 | 1 | 0 | python,django,web-applications,web | 52,409,650 | 6 | false | 1 | 0 | Virtual environment creates virtual installation of python and packages on your computer .
Say,if you have your web application .With pass of time the packages get updated and there are changes that sometimes break backwards compaatibility that your web application or web project may depend on
so what do you do if y... | 4 | 8 | 0 | I'm currently a novice in web programming. I've been working on this Django project lately, and I've been reading about virtual environments. At the start of my project, I was unable to set up a virtual environment, and so I proceeded with the project without it. My questions are
Whether or not this virtual environment... | Virtual Environment for Python Django | 0 | 0 | 0 | 15,405 |
41,279,547 | 2016-12-22T09:17:00.000 | 3 | 0 | 1 | 0 | python,django,web-applications,web | 41,280,016 | 6 | false | 1 | 0 | In java all libs used can be packed into a war or jar file. The advantage is that you don't need to worry about the environments of the OS.
Python is a pure dynamic language. Without virtual environment, all the python libs need to be installed into system path and shared among all python project.
Imagine that you are... | 4 | 8 | 0 | I'm currently a novice in web programming. I've been working on this Django project lately, and I've been reading about virtual environments. At the start of my project, I was unable to set up a virtual environment, and so I proceeded with the project without it. My questions are
Whether or not this virtual environment... | Virtual Environment for Python Django | 0.099668 | 0 | 0 | 15,405 |
41,280,318 | 2016-12-22T09:56:00.000 | 0 | 0 | 1 | 0 | python,finally,ctrl | 41,280,395 | 3 | false | 0 | 0 | Yes, it will usually raise a KeyboardInterrupt exception, but remember that your application can be unexpectedly terminated at any time, so you shouldn't rely on that. | 1 | 13 | 0 | If you stop a python script with Ctrl+C, will it execute any finally blocks, or will it literally stop the script where it is? | Will Python execute finally block after receiving Ctrl+C | 0 | 0 | 0 | 7,329 |
41,281,590 | 2016-12-22T11:00:00.000 | 0 | 0 | 1 | 0 | python,visual-studio | 44,493,312 | 1 | false | 0 | 0 | Assuming you configured it correctly, it would still take some time for IntelliSense to finish scrapping and analysing your python libraries. | 1 | 0 | 0 | When I installed Visual Studio 2015 I also installed PTVS (Python Tools for Visual Studio) version 2.2.4; But after I installed it, autocomplete won't work for my Python code. I have installed an interpreter (CPython 3.5) and that still doesn't solve the problem. | Python on Visual Studio | 0 | 0 | 0 | 97 |
41,285,298 | 2016-12-22T14:23:00.000 | 0 | 1 | 0 | 0 | telegram,telegram-bot,python-telegram-bot,php-telegram-bot | 41,792,018 | 4 | false | 0 | 0 | It will just show preview of link and if it's an audio, an audio bar will be shown. so the answer is yes, but it will not start automatically and user should download and play it. | 2 | 3 | 0 | Telegram BOT API has functions to send audio files and documents ,But can it play from an online sound streaming URL? | Can the Telegram bot API play sound from an online audio streaming URL? | 0 | 0 | 1 | 3,630 |
41,285,298 | 2016-12-22T14:23:00.000 | 0 | 1 | 0 | 0 | telegram,telegram-bot,python-telegram-bot,php-telegram-bot | 41,324,053 | 4 | false | 0 | 0 | No, you can't with Telegram Bot APIs.
You must download the file and upload it on Telegram servers. | 2 | 3 | 0 | Telegram BOT API has functions to send audio files and documents ,But can it play from an online sound streaming URL? | Can the Telegram bot API play sound from an online audio streaming URL? | 0 | 0 | 1 | 3,630 |
41,285,440 | 2016-12-22T14:30:00.000 | 1 | 1 | 0 | 0 | python,optimization,tensorflow,deep-learning,jupyter-notebook | 54,832,398 | 2 | false | 0 | 0 | If you find it, youll realize it just jumps to pyhon/framework, where the actual update is just an assign operation and then gets grouped | 1 | 2 | 1 | I'm working on a new optimizer, and I managed to work out most of the process. Only thing I'm stuck on currently is finding gen_training_ops.
Apparently this file is crucial, because in both implementations of Gradient Descent, and Adagrad optimizers they use functions that are imported out of a wrapper file for gen_tr... | Can't find "gen_training_ops" in the tensorflow GitHub | 0.099668 | 0 | 0 | 719 |
41,287,312 | 2016-12-22T16:08:00.000 | 0 | 1 | 0 | 1 | python,trac,bitnami | 41,288,887 | 1 | true | 0 | 0 | I found out that there was another service running on the 8080 port that I had setup trac on and that was causing the trouble. The error in the logs was not pointing to that as being the issue however. | 1 | 0 | 0 | I installed trac using BitNami the other day and after restarting my computer I'm not able to get it running as a service today. I see in the error log this error
[Fri Dec 02 08:52:40.565865 2016] [:error] [pid 4052:tid 968] C:\Bitnami\trac-1.0.13-0\python\lib\site-packages\setuptools-7.0-py2.7.egg\pkg_resources.py:1... | "Python-Eggs is writable by group/others" Error in Windows 7 | 1.2 | 0 | 0 | 400 |
41,287,609 | 2016-12-22T16:25:00.000 | 2 | 0 | 0 | 0 | python,django,database,standards | 41,287,774 | 1 | true | 1 | 0 | A common philosophy in Django is "fat models, thin views", so preferably you would put as much of this DML functionality as functions on your model classes. Since models.py already defines the structure of your data, it makes sense to put functions that manipulate your data in the same file as much as possible. | 1 | 0 | 0 | 'Methods that perform like DML' means methods that change data in the database.
Is there a standard or guideline for that?
Below are my own guesses.
Collect all functions in file of which name is like 'data_access.py'
Contain functions in each class of models.py
There is no standard. No one will blame even if I make t... | Python/Django - Where do I have to make methods that perform like DML? | 1.2 | 0 | 0 | 117 |
41,288,716 | 2016-12-22T17:26:00.000 | 0 | 0 | 0 | 0 | python,django,pep8 | 41,290,255 | 1 | false | 1 | 0 | There certainly is something you can do about it, if it bothers you that much. All relationship fields that automatically define a reverse relation also allow you to override that default by specifying related_name. So if you really don't like profile.profileattributegroup, define the one-to-one field with related_name... | 1 | 1 | 0 | As PEP8 states, one should name classes that have several words with camelcase (e.g. ProfileAttributeGroup), and use underscores for variables (profile_attribute_group).
However when it comes to django and reverse relations (and templates), we are forced to use lowercased name of classes.
For example, if our ProfileAt... | django - underscoring foreign keys - pros and cons | 0 | 0 | 0 | 76 |
41,289,031 | 2016-12-22T17:45:00.000 | 0 | 0 | 0 | 1 | python,google-cloud-dataflow | 43,789,865 | 1 | true | 0 | 0 | As determined by thylong and jkff:
The extra_package was binary-incompatible with Dataflow's packages. The requirements.txt in the root directory and the one in the extra_package were different, causing the exec.go in DataFlow container failing again and again. To fix, we recreated the venv with the same frozen depend... | 1 | 0 | 0 | With the Python SDK, the job seems to hang forever (I have to kill it manually at some point) if I use the extra_package option to use a custom ParDo.
Here is a job id for example : 2016-12-22_09_26_08-4077318648651073003
No explicit logs or errors are thrown...
I noticed that It seems related to the extra_package opti... | Job hangs forever with no logs | 1.2 | 0 | 0 | 88 |
41,296,179 | 2016-12-23T06:21:00.000 | 2 | 0 | 0 | 0 | python,google-chrome,selenium,google-search,browser-automation | 41,296,329 | 1 | false | 0 | 0 | Use this url - https://www.google.com/ncr. This will not redirect to your location specific site. | 1 | 0 | 0 | When I'm opening google.com and doing a search in Chrome Selenium WebDriver, it redirects me to my local google domain, although the search string I'm using is "google.com ....." How can I remain on the "com" domain? | How can I avoid being redirected to a local google domain in Selenium Chrome? | 0.379949 | 0 | 1 | 202 |
41,297,839 | 2016-12-23T08:31:00.000 | 0 | 0 | 1 | 0 | python-3.x | 41,312,156 | 2 | false | 0 | 0 | Thank you for answering my question. As I tried your example:
(print("a\rb") # => b
print("abcdef\rLOL") #=> LOLdef
I still got b and LOL for the answers....
I don't know why it keeps happening...
I am using pycharm by the way... Let me know how I fix it... | 1 | 0 | 0 | I am running codes in python 3.5.2 in mac. (pycharm)
When I run print("abcz\rdef"), I was expecting to get defz, but I got def...
What is happening right now? | what is \r in python 3.5.2? (pycharm & Mac) | 0 | 0 | 0 | 330 |
41,298,588 | 2016-12-23T09:23:00.000 | 0 | 0 | 0 | 0 | python,c++,windows,opencv,usb | 41,299,177 | 3 | false | 0 | 0 | If you can differentiate the cameras by their serial number or device and vendor id, you can loop through all video devices before opening with opencv and search for the camera device you want to open. | 1 | 3 | 1 | I have a python environment (on Windows 10) that uses OpenCV VideoCapture class to connect to multiple usb cameras.
As far as I know, there is no way to identify a specific camera in OpenCV other than the device parameter in the VideoCapture class constructor / open method.
The problem is that the device parameter chan... | OpenCV VideoCapture device index / device number | 0 | 0 | 0 | 10,992 |
41,298,599 | 2016-12-23T09:24:00.000 | 0 | 0 | 0 | 0 | python,cumsum,prop | 41,499,342 | 1 | false | 0 | 0 | It seems that you invoked sort_index instead of sort_values. The by='prop' doesn't make sense in such a context (you sort the index by the index, not by columns in the data frame).
Also, in my early release copy of the 2nd edition, this appears near the top of page 43. But since this is early release, the page number... | 1 | 0 | 1 | I'm working on this book and keep running error when i'm run "Prop_cumsum"
> prop_cumsum = df.sort_index(by='prop', ascending=False).prop.cumsum()
/Users/anaconda/lib/python3.5/site-packages/ipykernel/main.py:1:
FutureWarning: by argument to sort_index is deprecated, pls use
.sort_values(by=...) if name == 'main... | Python for Data Analysis: Chp 2 Pg 38 "prop_cumsum" error | 0 | 0 | 0 | 187 |
41,299,126 | 2016-12-23T09:57:00.000 | 0 | 0 | 0 | 0 | python,machine-learning,tensorflow,deep-learning,google-developer-tools | 50,601,700 | 2 | false | 1 | 0 | Doesn't TF actually also uses google's models from cloud? I'm pretty sure google uses cloud data to provide better models for TF.
I'd recommend you to stay away from it. Only by writing your models from scratch you will learn to do useful stuff with it long term. I can also recommend weka for java, it's open source an... | 1 | 0 | 1 | Does anyone have any idea whether Google collects data that one supplies to Tensorflow? I mean it is open source, but it falls under their licences. | TensorFlow from Google - Data Security | 0 | 0 | 0 | 861 |
41,303,027 | 2016-12-23T14:12:00.000 | 0 | 0 | 1 | 0 | python,python-3.x,crash,anaconda,spyder | 59,740,947 | 3 | false | 0 | 0 | Run the following command conda update --all on Ananconda Prompt to solve this issue. In my case, it ended up downgrading Spyder from 4.0.1 to 3.3.5 (2 versions behind). If the version does not matter much to you, this will fix the error. | 3 | 3 | 0 | I used to compile on Spyder at work, so I downloaded Anaconda 4.2 with Python 3.5 64bit for installing it on my own PC too.
But it doesn't work!
Every time I try to open spyder or a Notebook, or even the Anaconda Navigator, it crashes and an error message of "Python stop working"
I tried to open spyder from command pr... | Python stops working while trying to open Spyder or Anaconda Navigator | 0 | 0 | 0 | 3,410 |
41,303,027 | 2016-12-23T14:12:00.000 | 0 | 0 | 1 | 0 | python,python-3.x,crash,anaconda,spyder | 41,307,185 | 3 | false | 0 | 0 | You should tell us the exact and complete error message that you got. But you should probably uninstall Anaconda and all its parts (including Python), delete the .anaconda and related sub-folders in your Users folder, then reinstall Anaconda. If that doesn't work, let us know. Don't skip deleting those sub-folders: I s... | 3 | 3 | 0 | I used to compile on Spyder at work, so I downloaded Anaconda 4.2 with Python 3.5 64bit for installing it on my own PC too.
But it doesn't work!
Every time I try to open spyder or a Notebook, or even the Anaconda Navigator, it crashes and an error message of "Python stop working"
I tried to open spyder from command pr... | Python stops working while trying to open Spyder or Anaconda Navigator | 0 | 0 | 0 | 3,410 |
41,303,027 | 2016-12-23T14:12:00.000 | 0 | 0 | 1 | 0 | python,python-3.x,crash,anaconda,spyder | 42,871,777 | 3 | false | 0 | 0 | Check your firewall (try disabling it temporarily). That turned out to be the issue in my case (after trying to reinstall different versions of spyder/anaconda 20 times). | 3 | 3 | 0 | I used to compile on Spyder at work, so I downloaded Anaconda 4.2 with Python 3.5 64bit for installing it on my own PC too.
But it doesn't work!
Every time I try to open spyder or a Notebook, or even the Anaconda Navigator, it crashes and an error message of "Python stop working"
I tried to open spyder from command pr... | Python stops working while trying to open Spyder or Anaconda Navigator | 0 | 0 | 0 | 3,410 |
41,304,164 | 2016-12-23T15:38:00.000 | 2 | 1 | 0 | 0 | python-3.5,python-embedding | 41,304,207 | 1 | true | 0 | 1 | It can be done with Py_SetPythonHome. | 1 | 1 | 0 | I am currently embedding Python3 into my C++ application.
We also ships a defined version of Python3. Currently Py_Initialize finds the system python in /usr/lib/python3.5 (which we do not want). I could not yet figure out how I can strip the search path before calling Py_Initialize and force it to search in my custom ... | Embedding specific Python | 1.2 | 0 | 0 | 34 |
41,304,621 | 2016-12-23T16:12:00.000 | 1 | 0 | 0 | 0 | python,pip,lxml | 45,203,932 | 1 | false | 0 | 0 | Install missing dependency sudo apt-get install zlib1g-dev | 1 | 0 | 0 | I know this question has been asked before but I've tried pretty much every solution listed on every question I can find, all to no avail.
Pip install lxml doesn't work, nor does easy_install lxml. I have downloaded and tried a handful of different versions of lxml:
lxml-3.6.4-cp27-cp27m-win32 (WHL file)
lxml-3.7.0-cp... | Can't install lxml module | 0.197375 | 0 | 1 | 1,539 |
41,305,139 | 2016-12-23T16:53:00.000 | 0 | 0 | 1 | 0 | python,dynamic-typing | 41,306,745 | 2 | false | 0 | 0 | The simple answer is probably start without any typechecking and see what happens. You'll probably find out - as I did 17 years ago and much to my surprise - that you need it way less than you believe. For the record used to think you couldn't hope to write anything but quick scripts and toy programs without strict t... | 1 | 6 | 0 | I'm starting to learn Python and as a primarily Java developer the biggest issue I am having is understanding when and when not to use type checking. Most people seem to be saying that Python code shouldn't need type checking, but there are many cases when I believe it is necessary. For example, let's say I need to use... | When should I use type checking (if ever) in Python? | 0 | 0 | 0 | 569 |
41,305,432 | 2016-12-23T17:16:00.000 | 2 | 0 | 1 | 0 | windows,python-2.7,python-3.x,pip,urllib3 | 42,188,924 | 4 | false | 0 | 0 | May be worth double checking your PYTHONPATH Environment Variable in:
Control Panel\System and Security\System -> Advanced System Settings -> Environment Variables.
I had a rogue copy of Python that caused this exact error | 2 | 0 | 0 | Everytime I use pip command the command failed with error: "ImportError: No module named 'urllib3'".
I do got urllib3 installed, and when I'm trying to install urllib3 again I got the same error. What can I do?
I'm using windows 10.
I cant run "pip install virtualenv", I got the same error with any pip command. | ImportError: No module named 'urllib3' | 0.099668 | 0 | 1 | 6,193 |
41,305,432 | 2016-12-23T17:16:00.000 | 0 | 0 | 1 | 0 | windows,python-2.7,python-3.x,pip,urllib3 | 41,306,324 | 4 | false | 0 | 0 | For escaping this error try to install virtualenv through "pip install virtualenv" and create the virtual environment directory using "python3 -m venv myvenv" which will create a myvenv named folder now activate the myvenv folder using "source \myvenv\bin\activate" now you have your virtual environment setup now you ca... | 2 | 0 | 0 | Everytime I use pip command the command failed with error: "ImportError: No module named 'urllib3'".
I do got urllib3 installed, and when I'm trying to install urllib3 again I got the same error. What can I do?
I'm using windows 10.
I cant run "pip install virtualenv", I got the same error with any pip command. | ImportError: No module named 'urllib3' | 0 | 0 | 1 | 6,193 |
41,310,316 | 2016-12-24T04:26:00.000 | 1 | 0 | 1 | 0 | python,date,nlp | 41,347,322 | 1 | true | 0 | 0 | There is! (Python is amazing)
dateutil.parser.parse("today is 21 jan 2016", fuzzy=True) | 1 | 1 | 0 | when I use this code for extracting the date
dateutil.parser.parse('today is 21 jan 2016')
It throws an error -> ValueError: unknown string format
is there any way to extract dates and time from a sentence??? | how to find unstructured date and time from a sentence in python? | 1.2 | 0 | 0 | 1,640 |
41,310,818 | 2016-12-24T06:10:00.000 | 0 | 0 | 0 | 0 | python-3.x,sockets | 54,252,278 | 1 | false | 0 | 0 | Working with MAC addresses should do it, login/pass, or pass-phrases. – Papipone | 1 | 0 | 0 | I am currently working on a test application involving a server and several client. The communication is achieved through the use of the TCP/IP protocol.
The server has several slots available. When a client connects, this one is affected to a slot. Is there a reliable way to identify if a disconnected client has recon... | Python3 knwowing if a disconnected client has reconnected | 0 | 0 | 1 | 55 |
41,312,197 | 2016-12-24T09:54:00.000 | 2 | 0 | 1 | 0 | python,computer-vision,tensorflow,conv-neural-network | 41,315,329 | 2 | true | 0 | 0 | Only two classes. "Not food" is your background class. If you were trying to detect food or dogs, you could have 3 classes: "food", "dog", "neither food nor dog". | 1 | 1 | 1 | I see that a background class is used as a bonus class. So this class is used in case of not classifying an image in the other classes? In my case, I have a binary problem and I want to understand if an image contains food or not. I need to use 2 classes + 1 background class = 3 classes or only 2 classes? | Number of classes for inception network (Tensorflow) | 1.2 | 0 | 0 | 397 |
41,318,435 | 2016-12-25T03:15:00.000 | 1 | 0 | 1 | 0 | python-2.7,numpy,scipy,voice-recognition,voice | 41,329,052 | 1 | true | 0 | 0 | It is not possible to compare to speech samples on a sample level (or time domain). Each part of the spoken words might vary in length, so they won't match up, and the levels of each part will also vary, and so on. Another problem is that the phase of the individual components that the sound signal consists of can chan... | 1 | 0 | 1 | I want to record a word beforehand and when the same password is spoken into the python script, the program should run if the spoken password matches the previously recorded file. I do not want to use the speech recognition toolkits as the passwords might not be any proper word but could be complete gibberish. I starte... | Voice activated password implementation in python | 1.2 | 0 | 0 | 851 |
41,324,742 | 2016-12-25T21:46:00.000 | 2 | 0 | 1 | 0 | python | 41,324,764 | 1 | true | 0 | 0 | This means that ˋbio ˋ should be assigned to ˋuser.bio ˋ if the expression after the if is true. If the expression after the if return false, assign the result of the expression after else to ˋuser.bio ˋ.
It is the python equivalent of the C and C++ ?: ternary operator expression. | 1 | 0 | 0 | a user is trying to update their info.
I have been reading this line of code but I still do not understand what does the bio in front of the if statement does.
the varaible bio is actually from an input
bio = data.get('bio', '')
user.bio = bio if bio else user.bio
P.S.
I just realised, could this be like a shorthand fo... | what does this variable mean in front of the if statement? python | 1.2 | 0 | 0 | 226 |
41,326,384 | 2016-12-26T04:18:00.000 | 6 | 1 | 0 | 0 | python,rfid,mifare | 42,299,452 | 2 | false | 0 | 0 | There are 2 types of UID writeble cards:
Block 0 writable cards: you can write block 0 at any moment
Backdoored cards
If writing block 0 does not work, you probably have a backdoored card:
To enable the backdoor, you need to send the following sequence to the card:
(everything in hexadecimal)
RC522 > Card: 50 00 57 ... | 1 | 3 | 0 | Here is my issue: my RC522 module is connected to my Pi2 via SPI and I'm able to read all [64 blocks / 16 sectors] using both MFRC522-python and pi-rc522 libraries. Also I'm able to write and change all the blocks(63 blocks) except for Block 0 (including UID) of a Chinese Mifare 1K card that I bought from ebay and it s... | re-writing uid and block 0 on Chinese (supposed to be writable) MIFARE 1K card in python | 1 | 0 | 0 | 12,984 |
41,328,993 | 2016-12-26T09:25:00.000 | 0 | 0 | 0 | 0 | django,python-2.7 | 41,331,613 | 2 | false | 1 | 0 | There is no way to do what you want, by design. | 1 | 0 | 0 | I want to display all the Internet History Information of a system using Python? | How do i retrieve browsers history in python django? | 0 | 0 | 0 | 399 |
41,329,665 | 2016-12-26T10:15:00.000 | 2 | 0 | 0 | 0 | python-2.7,opencv3.0 | 65,705,673 | 4 | false | 0 | 0 | old implementation is not available.
Now it is available as follows:
fld = cv2.ximgproc.createFastLineDetector()
lines = fld.detect(image) | 1 | 13 | 1 | Can a sample implementation code or a pointer be provided for implementing LSD with opencv 3.0 and python? HoughLines and HoughLinesP are not giving desired results in python and want to test LSD in python but am not getting anywhere.
I have tried to do the following:
LSD=cv2.createLineSegmentDetector(0)
lines_std=LSD... | LineSegmentDetector in Opencv 3 with Python | 0.099668 | 0 | 0 | 18,293 |
41,329,994 | 2016-12-26T10:42:00.000 | 1 | 0 | 1 | 0 | python,derivative,quantlib | 41,336,999 | 1 | false | 0 | 0 | FX forward is currently not supported. Not sure about the swap. | 1 | 0 | 0 | Is there any possibility to value fx instruments in QuantLib-Python (especially, fx forwards, fx swaps)? For the last two days I have been looking through the documentation but I have only found "one currency" instruments like "VanillaSwap" and etc. Probably, one could use other libraries that are based on QuantLib... ... | Fx forward valuation in QuantLib-Python | 0.197375 | 0 | 0 | 806 |
41,330,221 | 2016-12-26T10:59:00.000 | 3 | 0 | 1 | 0 | python,python-3.x | 41,330,324 | 2 | true | 0 | 0 | Wrap the whole code with a try-catch is the most simple way but it doesn't fix the problem.
I think the best way is to find out the root cause of crash and take care of it even just print an error message and exit. | 1 | 4 | 0 | Say, I have a big application in python running on a server a few times per day and sometimes it crashes. I want, when it crashes, it at least to release all the resources such as db connection, file handlers, etc.
I've got some "try ... except" blocks in it, but who knows where it's going to crash next? It's possible... | Is it ok to wrap the whole code into "try ... except" as the last resort? | 1.2 | 0 | 0 | 2,449 |
41,331,567 | 2016-12-26T12:49:00.000 | 0 | 0 | 0 | 0 | python,django,profiling,django-channels,daphne | 46,773,111 | 2 | false | 1 | 0 | Why not stick a monitoring tool something like Kibana or New Relic and monitor why and what's taking so long for a small payload response. It can tell you the time spent on Python, PostgreSQL and Memcache (Redis). | 1 | 18 | 0 | My technology stack is Redis as a channels backend, Postgresql as a database, Daphne as an ASGI server, Nginx in front of a whole application. Everything is deployed using Docker Swarm, with only Redis and Database outside. I have about 20 virtual hosts, with 20 interface servers, 40 http workers and 20 websocket worke... | How to profile django channels? | 0 | 0 | 0 | 1,604 |
41,332,955 | 2016-12-26T14:57:00.000 | 0 | 0 | 0 | 0 | python,python-3.x,tkinter | 60,816,826 | 2 | false | 0 | 1 | I recommend using one main window with the buttons and put the rest of the widgets in different labelframes that appear and disappear upon execution of different functions by the buttons | 1 | 3 | 0 | I'm creating a Wizard in Tkinter. Almost each of the steps shoud I have the same footer with the button for navigation and cancelling. How can I achieve this? Should I create a Frame? And in general, should all the steps be created as different frames? | Creating a wizard in Tkinter | 0 | 0 | 0 | 4,441 |
41,338,208 | 2016-12-27T02:16:00.000 | 1 | 0 | 0 | 0 | database,sqlite,python-3.x,django-models | 41,338,383 | 2 | false | 1 | 0 | I think it's not a good idea to create a table for each user. This may cause bad performance and low security. Why don't you create a table named userInfo and put user.userID as a foreign key? | 1 | 0 | 0 | I am wondering if there is any way to create a new model table in SQLite with Django 1.10 (like writing general python code) without having to specify in the models.py. The situation is if there is a new member registered on my website, then I will create a new model table for them to hold their data. Specifically:
ste... | Django 1.10 Create Model Tables Automatically | 0.099668 | 1 | 0 | 292 |
41,338,354 | 2016-12-27T02:38:00.000 | 1 | 0 | 0 | 0 | python,animation,scripting,maya | 41,349,764 | 2 | false | 0 | 0 | It worked when I gave the name of the ik_handle instead of a custom defined variable for ik_handle.
ankle_grp=cmds.group( 'ankle_ik', 'ball_ik',n='ankle_grp') | 1 | 0 | 0 | I'm trying to automate the foot rig process in maya using python. When I try to group the ikHandles using this line of code, ankle_grp=cmds.group( ankle_ik, ball_ik,n='ankle_grp'), the effectors of the ikHandles are also coming into the ankle_grp. I do not want that. I want the ankle_grp to have only the ik Handles and... | How to select only ikHandle and not it's effector using python in Maya? | 0.099668 | 0 | 0 | 268 |
41,338,712 | 2016-12-27T03:39:00.000 | 1 | 0 | 0 | 0 | wxpython,wxformbuilder | 41,374,082 | 1 | false | 0 | 1 | Okay this is what i did, i added regular wxTreeCtrl from wxFB, then in the property pane under subclass, changed name to TreeListCtrl and header to wx.gizmos.
Additional settings (like adding multiple columns and all) needs to be done manually in the derived frame class in init
Event handlers can be added through wxFB ... | 1 | 0 | 0 | I am planning to use wxformbuilder to design application user interface. It's great tool and I like wxPython.
But i don't see gizmos widgets anywhere on the UI. I am particularly interested in gizmos.TreeListCtrl widget which supports tree with multi column entries.
Anybody has tried intergrating gizmos widget with wxf... | how to integrate gizmos widgets in wxformbuilder | 0.197375 | 0 | 0 | 201 |
41,339,450 | 2016-12-27T05:23:00.000 | 2 | 0 | 0 | 0 | wxpython,wxwidgets,wxformbuilder | 41,344,951 | 1 | false | 0 | 1 | In formbuilder, the wxSplitterWindow control accepts 2 (and only 2) children. Those children can be either wxPanels or wxScrolledWindows. You can then add a sizer any other controls to those you want to those children.
If you use panels for the children, make sure to use the wxPanel from the "Containers" page and n... | 1 | 0 | 0 | i am trying to design UI using wxFormBuilder. I have added wxFrame -> wxGridBagSizer -> wxSplitterWindow.
After this point wxFormBuilder is not allowing me to put any windows under splitter window. I tried putting almost every widget. I also tried putting sizers under splitter window. But nothing is working.
All the wi... | wxformbuilder does not allow putting windows under wxsplitterwindow | 0.379949 | 0 | 0 | 556 |
41,340,495 | 2016-12-27T06:59:00.000 | 2 | 0 | 1 | 0 | python,python-2.7,pathos | 41,346,636 | 1 | false | 0 | 0 | I'm the pathos author. pathos has a few dependencies, and if you are installing pathos by hand (as you are doing now), you have to get all of the dependencies for it fully work.
The easiest thing to do is to use pip, and pip install pathos.
Or, you can first install setuptools, and then repeat what you already have do... | 1 | 0 | 0 | I try to use pathos for multiprocessing，but when I start the
process, I get the ImportError:no module named pp，please help me.
I download pathos from github, install by python setup.py, python version 2.7.8, | importerror when I use pathos | 0.379949 | 0 | 0 | 1,876 |
41,341,113 | 2016-12-27T07:45:00.000 | 0 | 0 | 0 | 0 | python,html,django | 41,341,521 | 1 | true | 1 | 0 | In your view add handle for POST requests and in that case render your template with template variable of your POST data. | 1 | 0 | 0 | How to get input from textarea and display them onto my webpage immediately after submit on Django? | Django: Get user's input in textarea and display them on page | 1.2 | 0 | 0 | 375 |
41,343,316 | 2016-12-27T10:24:00.000 | 7 | 0 | 0 | 0 | python,sqlalchemy,flask-sqlalchemy,alembic,flask-migrate | 41,357,149 | 3 | false | 1 | 0 | You can figure out if your project as at the latest migration with the current subcommand:
Example output when you are at the latest migration:
(venv) $ python app.py db current
f4b4aa1dedfd (head)
The key thing is the (head) that appears after the revision number. That tells you that this is the most recent migration... | 1 | 8 | 0 | We're using SQLAlchemy and Alembic (along with Flask-SQLAlchemy and Flask-Migrate). How to check if there are pending migrations?
I tried to check both Alembic's and Flask-Migrate's documentation but failed to find the answer. | How to check if there are pending migrations when using SQLAlchemy/Alembic? | 1 | 1 | 0 | 4,164 |
41,344,017 | 2016-12-27T11:07:00.000 | 0 | 0 | 1 | 0 | python,ubuntu,anaconda,environment,spyder | 41,346,692 | 2 | false | 0 | 0 | (Posted on behalf of the OP).
It is solved: I reinstalled spyder and it works properly now. Thank you. | 1 | 0 | 1 | I have not used Linux/Unix for more a decade. Why does the 'tensorflow' module import fail in Spyder and not in Jupyter Notebook and not in Python prompt?
SCENARIO:
[terminal] spyder
[spyder][IPython console] Type 'import tensorflow as tf' in the IPython console
CURRENT RESULT:
[spyder][IPython console] Message erro... | Why does the 'tensorflow' module import fail in Spyder and not in Jupyter Notebook and not in Python prompt? | 0 | 0 | 0 | 1,193 |
41,346,055 | 2016-12-27T13:25:00.000 | 0 | 0 | 0 | 0 | python,machine-learning,scikit-learn,logistic-regression | 66,783,030 | 1 | false | 0 | 0 | You can use the warm_start option (with solver not liblinear), and manually set coef_ and intercept_ prior to fitting.
warm_start : bool, default=False
When set to True, reuse the solution of the previous call to fit as initialization, otherwise, just erase the previous solution. Useless for liblinear solver. | 1 | 4 | 1 | I am using scikit-learn's linear_model.LogisticRegression to perform multinomial logistic regress. I would like to initialize the solver's seed value, i.e. I want to give the solver its initial guess as the coefficients' values.
Does anyone know how to do that? I have looked online and sifted through the code too, but... | Feeding a seed value to solver in Python Logistic Regression | 0 | 0 | 0 | 493 |
41,347,484 | 2016-12-27T15:02:00.000 | 0 | 0 | 1 | 0 | python | 41,347,592 | 4 | false | 0 | 0 | the hard way,
get the ascii equivalent of each letter
generate a random letter between the range of highest and lowest ascii value
join the random characters together | 1 | 0 | 0 | How to shuffle to inputted strings, and to mix together to jumble the two strings up.
For example "hello" and "world" shuffle together to become "wherd llohe" | Anybody know how to shuffle two strings together? | 0 | 0 | 0 | 1,312 |
41,352,692 | 2016-12-27T21:58:00.000 | 2 | 1 | 0 | 0 | python,maximo,escalation | 41,363,700 | 1 | false | 0 | 0 | Applying the conditional approval of labor records (all labor started over 21 days ago) can be done in the escalation. I'm not saying it can't be done in the automation script. But, it is easy enough to write the SQL filter in the "Condition" box, I found out. I had started down this path first, but had used the wrong ... | 1 | 0 | 0 | Thanks in advance.
We have a Maximo automation script (python) that approves all labor transactions when it runs from a scheduled escalation. "mbo.approveLaborTransaction()" is the entire script. No problems with the automation script or the escalation.
But, instead of approving ALL labor, when it runs, we would like ... | Maximo 7.6 - Conditionally approving labor transactions with automation script and escalation | 0.379949 | 0 | 0 | 905 |
41,357,580 | 2016-12-28T07:43:00.000 | 0 | 1 | 0 | 0 | python,eclipse,selenium,automated-tests | 41,359,710 | 1 | false | 0 | 0 | which unit test framework you are using, and why you are running from eclipse, i mean it's good for testing but eventually you will have to integrate that with Jenkins or other software so can you try running from command line and see what's happening.
by the way, what error you are getting? | 1 | 0 | 0 | I'm using eclipse program to run selenium python, but there is an issue that when I run over 1000 TCs in one times, only 1000 first TC have test result. If I separate these TCs to many parts with each part is less than 1000 TC, the test result is received completely. I think the issue is not from coding, how can I fix ... | Cannot get test result if running over 1000 Test cases in selenium python | 0 | 0 | 1 | 40 |
41,359,091 | 2016-12-28T09:29:00.000 | 0 | 0 | 1 | 0 | python,pip,fedora,requirements.txt | 41,496,794 | 3 | false | 0 | 0 | Since we're discussing options - I'll throw in one that hasn't been discussed.
Docker containers.
You can install a base image with the OS you want, and then the Docker file will install all the dependencies you need. It can also pip install the requirements.
This keeps the server clean of any installations it doesn... | 2 | 13 | 0 | So I have this project with many dependencies that are being installed from pip and are documented in requirements.txt
I need to add another dependency now that doesn't exist on pip and I have it as an RPM in some address.
What is the most Pythonic way to install it as a requirement?
Thanks!
The code will run on RHEL ... | Add module from RPM as a requirement | 0 | 0 | 0 | 1,375 |
41,359,091 | 2016-12-28T09:29:00.000 | 7 | 0 | 1 | 0 | python,pip,fedora,requirements.txt | 41,404,348 | 3 | true | 0 | 0 | In this case, the Pythonic thing to do would be to simply fail if a dependency cannot be met. It's okay, and your users will appreciate a helpful error if they haven't satisfied a prerequisite for the installation. Consider the numerous Python packages out there with C library dependencies in order to be built and inst... | 2 | 13 | 0 | So I have this project with many dependencies that are being installed from pip and are documented in requirements.txt
I need to add another dependency now that doesn't exist on pip and I have it as an RPM in some address.
What is the most Pythonic way to install it as a requirement?
Thanks!
The code will run on RHEL ... | Add module from RPM as a requirement | 1.2 | 0 | 0 | 1,375 |
41,360,265 | 2016-12-28T10:39:00.000 | 5 | 0 | 0 | 0 | python,pandas | 41,402,234 | 1 | true | 0 | 0 | @JohnGalt posted an answer to this on the comments. Thanks a lot. I just wanted to put the answer here just in case if people are looking for similar information in the future.
df.shift(1) df.loc[0] = new_row
df.shift(n) will shift the rows n times, filling the first n rows with na and getting rid of last n rows. The n... | 1 | 1 | 1 | I need to maintain a Pandas dataframe with 500 rows, and as the next row becomes available I want to push that new row in and throw out the oldest row from the dataframe. e.g. Let's say I maintain row 0 as newest, and row 500 as oldest. When I get a new data, I would push data to row 0, and it will shift row 0 to row 1... | How to do a FIFO push-operation for rows on Pandas dataframe in Python? | 1.2 | 0 | 0 | 2,326 |
41,361,080 | 2016-12-28T11:25:00.000 | 1 | 0 | 0 | 0 | python,pyspark,collaborative-filtering | 41,366,334 | 1 | true | 0 | 0 | It it not necessary (for implicit) and shouldn't be done (for explicit) so in this case bass only data you actually have. | 1 | 1 | 1 | I`m trying to make a recommender system based on purchase history using trainImplicit. My input is in domain [1, +inf) (the sum of views and purchases).
So the element of my input RDD looks like this: [(user_id,item_id),rating] --> [(123,5564),6] - the user(id = 123) interacted with the item(id=5564) 6 times.
Should I... | Understanding Spark MLlib ALS.trainImplicit input format | 1.2 | 0 | 0 | 363 |
41,361,091 | 2016-12-28T11:25:00.000 | 1 | 0 | 0 | 0 | python,amazon-web-services,snapshot,boto3,rds | 41,363,444 | 1 | false | 1 | 0 | This is not possible using the AWS RDS snapshot mechanism, and it isn't possible using the AWS SDK. It is possible using the API for the specific database engine you are using. You would need to specify what database you are using for further help. | 1 | 0 | 0 | I'm trying to save a snapshot of several tables programatically in python, instead of all DB.
I couldn't find the API (in boto/boto3) to do that.
Is it possible to do? | AWS RDS save snapshot of selected tables | 0.197375 | 1 | 0 | 540 |
41,361,151 | 2016-12-28T11:29:00.000 | 2 | 0 | 0 | 0 | python,pandas | 41,361,442 | 3 | true | 0 | 0 | the constructor pd.Dataframe must be called like a function, so followed by parentheses (). Now you are refering to the module pd.dataframes (also note the final 's').
the for x-construction you're using creates a sequence. In this form you can't assign it to the variable x. Instead, enclose everything right of the equ... | 2 | 2 | 1 | I am trying to create multiple empty pandas dataframes in the following way:
dfnames = ['df0', 'df1', 'df2']
x = pd.Dataframes for x in dfnames
The above mentionned line returns error syntax.
What would be the correct way to create the dataframes? | python pandas: create multiple empty dataframes | 1.2 | 0 | 0 | 3,447 |
41,361,151 | 2016-12-28T11:29:00.000 | 0 | 0 | 0 | 0 | python,pandas | 41,361,512 | 3 | false | 0 | 0 | You can't have many data frames within a single variable name, here you are trying to save all empty data frames in x. Plus, you are using wrong attribute name, it is pd.DataFrame and not pd.Dataframes.
I did this and it worked-
dfnames = ['df0', 'df1', 'df2']
x = [pd.DataFrame for x in dfnames] | 2 | 2 | 1 | I am trying to create multiple empty pandas dataframes in the following way:
dfnames = ['df0', 'df1', 'df2']
x = pd.Dataframes for x in dfnames
The above mentionned line returns error syntax.
What would be the correct way to create the dataframes? | python pandas: create multiple empty dataframes | 0 | 0 | 0 | 3,447 |
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