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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30,204,877 | 2015-05-13T02:58:00.000 | 1 | 0 | 0 | 0 | python,opencv,svm | 30,208,490 | 1 | false | 0 | 0 | The classic SVM does part the n-dimensional feature space with planes. That means every point in space is in one of the partitions and therefore belongs to one of the trained classes. there is no outlier detection.
However there is also the concept of a one-class SVM that tries to encapsulate the "known" space and clas... | 1 | 0 | 1 | I try to make classification multiclass with SVM on OpenCV (I use openCV for python). Let's say if I have 5 class and training it well. I have been test it, and got good result.
The problem appear when object from 6th class come to this classification. Althought I haven't train this class before, why I got result this ... | SVM find member of outside training set | 0.197375 | 0 | 0 | 87 |
30,207,296 | 2015-05-13T06:33:00.000 | 1 | 0 | 1 | 0 | python,ipython,anaconda,pythonpath,sys.path | 30,208,369 | 1 | false | 0 | 0 | .bashrc is read by "interactive" shells (when you start your terminal containing bash). Running Anaconda Spyder's Ipython doesn't start any interactive shell.
You have to setup your PYTHONPATH on "login" by specifying it in your .profile (you'll have to logout/login to make chages effective). | 1 | 1 | 0 | There are some modules I want to be able to import when I use IPython. I use IPython from the command line sometimes, and I also use IPython from Anaconda Spyder sometimes. I appended the PYTHONPATH environment variable in my .bashrc file to include the directory that contains the modules I want to import.
Now, when I ... | Difference between Spyder IPython and "normal" IPython sys.path | 0.197375 | 0 | 0 | 1,951 |
30,207,646 | 2015-05-13T06:53:00.000 | 1 | 1 | 1 | 0 | python,unit-testing,testing,pytest | 30,207,881 | 1 | true | 0 | 0 | Testing helper functions makes a lot of sense - in this context, these helper functions are the basic building blocks (read: units) for your application. Having tests that prove that they function properly will allow you to easily change their implementation without worrying about whether you're breaking something else... | 1 | 1 | 0 | I am writing a small command line tool in python, which has two subcommands (like: git init or git clone). Those subcommands use a few helper functions, which are not exposed on the command line. When writing tests with py.test, does it make sense to test every helper function separately or only test the two functions ... | Should I test helper functions or only the main function? | 1.2 | 0 | 0 | 1,214 |
30,208,421 | 2015-05-13T07:31:00.000 | 0 | 0 | 0 | 1 | python,web2py | 30,356,551 | 1 | false | 1 | 0 | Just use the file system.
GUI:
Copy your application folder to your new instance of web2py (/web2py/applications).
Command line:
scp -r /home/username/oldarea/web2py/application/myApp /home/username/newarea/web2py/applications | 1 | 2 | 0 | I am new to web2py I have web2py application in my local system i want to upload this application into web2py environment throught admin interface option present in web2py Upload & install packed application and do some modifications and run the application but i am unable to uploded the app please give the suggesatio... | how to upload the existing app in to web2py environment | 0 | 0 | 0 | 724 |
30,211,422 | 2015-05-13T09:57:00.000 | 1 | 0 | 0 | 0 | python,date,datetime,time,timezone | 30,234,068 | 1 | true | 0 | 0 | You should either convert the time to the time zone of the client, or show the time zone. I e, for a client in Warsaw show
"2015-05-14 11:40" or "2015-05-14 09:40 GMT" or similar.
Which one you want depends a lot on what data it is you are showing.
How to figure out the client timezone is a long topic that probably is ... | 1 | 1 | 0 | I'm using time and datetime modules in server and in client scripts. When I am receiving data that contains date from server - it is wrong and different to client because of wrong timezone and wrong time on server.
How to deal with it and what is the best way to deal with it?
Thanks | Server and client are python scripts, are there a way to synchronize server to client time without changing system dates anywere? | 1.2 | 0 | 1 | 197 |
30,213,356 | 2015-05-13T11:22:00.000 | 3 | 0 | 0 | 1 | python,concurrency,celery | 30,216,495 | 1 | true | 0 | 0 | To put it simply concurrency is the number of jobs running on a worker. Prefetch is the number of job sitting in a queue on a worker itself. You have 1 of 2 options here. The first is to set the prefetch multiplier down to 1. This will mean the worker will only keep, in your case, 8 additional jobs in it's queue. ... | 1 | 3 | 0 | In an environment with 8 cores, celery should be able to process 8 incoming tasks in parallel by default. But sometimes when new tasks are received celery place them behind a long running process.
I played around with default configuration, letting one worker consume from one queue.
celery -A proj worker --loglevel=INF... | how to configure celery executing tasks concurrently from on queue | 1.2 | 0 | 0 | 1,110 |
30,215,568 | 2015-05-13T13:00:00.000 | 0 | 0 | 0 | 0 | python,xml,django,curl | 30,215,688 | 1 | true | 1 | 0 | request.body should contain the XML as string.
I tried using curl, but the data I get on the Django side becomes a
dictionary
Can you please share the code blocks to receive/print the data? | 1 | 0 | 0 | How can I send an xml file to a Django app server from a command line interface?
I tried using curl, but the data I get on the Django side becomes a dictionary and doesn't look like xml. In addition to that I need some basic authorization mechanism. I tried curl examples, but to no avail. Maybe I am expecting the wron... | Send a XML file with authorization to a django app | 1.2 | 0 | 1 | 238 |
30,218,802 | 2015-05-13T15:07:00.000 | 0 | 0 | 1 | 0 | python,sys,sys.path | 55,073,298 | 9 | false | 0 | 0 | You can simply use../your_script_name.py
For example suppose the path to your python script is trading system/trading strategies/ts1.py. To refer to volume.csv located in trading system/data/. You simply need to refer to it as ../data/volume.csv | 1 | 76 | 0 | I want to get the parent of current directory from Python script. For example I launch the script from /home/kristina/desire-directory/scripts the desire path in this case is /home/kristina/desire-directory
I know sys.path[0] from sys. But I don't want to parse sys.path[0] resulting string. Is there any another way to ... | Get parent of current directory from Python script | 0 | 0 | 0 | 163,627 |
30,219,148 | 2015-05-13T15:23:00.000 | 2 | 0 | 1 | 0 | python,ipython,ipython-magic | 69,082,644 | 2 | false | 0 | 0 | %reset_selective accepts RegEx.
If you have variables named as: glob_x, glob_y, glob_z which you don't want to reset, you can use: %reset_selective -f ^(?!glob_).*$ | 1 | 7 | 0 | I'm aware of the %reset and %reset_selective commands in IPython. However, let's say you have many variables and you want to clear all variables except x, y, z. Is there a concise way to accomplish this?
Say a %reset_all_except x,y,z? | Clear all except for a few specific variables in IPython | 0.197375 | 0 | 0 | 2,642 |
30,221,772 | 2015-05-13T17:39:00.000 | 0 | 0 | 0 | 0 | python,websocket,server,capacity | 30,222,997 | 2 | false | 1 | 0 | One of solutions could be Pyramid, sockjs, gunicorn, and gevent. Nginx probably better suits to be a frontend than Apache, but of course if you do not have any lengthy processing on the backend, any decent asynchronous Python server with websocket and sockjs support (not sure about socket.io as an alternative) will wor... | 1 | 0 | 0 | I am new at Server side,
but I have gotten a chance to design and implement a server that will cover around 2000~3000 client.
And I am thinking that I will use Python and Websocket, though I don't know this choice is appropriate.
In this point, I am curious on how to design the server.
I think there must be some archit... | Server architecture depending on the capacity | 0 | 0 | 1 | 117 |
30,222,389 | 2015-05-13T18:15:00.000 | 0 | 0 | 0 | 0 | python,xlsx,xlsxwriter | 30,227,506 | 1 | false | 0 | 0 | But is there any way of calculating the sum value in memory.
Not with XlsxWriter since it doesn't have a calculation engine like Excel.
However, if you only need to do a sum then you could do that in Python. | 1 | 1 | 0 | I have a scenario in which I am writing formula for calculating the sum of values of different cells in xlsx. After calculating the sum I write it into different cell. I am doing this in python and for xlsx writing I am using xlsxwriter.
For writing values I am using inmemory option for xlsxwritter and... | How to trigger calculation of formula in xlsx while writing value cell | 0 | 1 | 0 | 505 |
30,223,012 | 2015-05-13T18:50:00.000 | 0 | 0 | 1 | 1 | python,macos,keyboard | 66,572,892 | 3 | false | 0 | 0 | Calling xkbswitch from python using subprocess would probably be easier than the other solutions you find here. | 1 | 2 | 0 | I wrote python software that requires both german and english input. Currently, I am using the Mac shortcut cmd-space to quickly change keyboard layouts, but I need to do this hundreds of times, which slows things down. Since I know exactly when English vs German input is needed, is there a way to programmatically chan... | python changing keyboard language in Mac OS X | 0 | 0 | 0 | 765 |
30,225,539 | 2015-05-13T21:33:00.000 | 0 | 0 | 0 | 0 | python,numpy,matrix | 30,227,232 | 3 | false | 0 | 0 | C = A[:,:,0]*(B==0) + A[:,:,1]*(B==1) should work. You can generalize this as np.sum([A[:,:,k]*(B==k) for k in np.arange(A.shape[-1])], axis=0) if you need to index more planes. | 1 | 3 | 1 | I have a tensor A such that A.shape = (32, 19, 2) and a binary matrix B such that B.shape = (32, 19). Is there a one-line operation I can perform to get a matrix C, where C.shape = (32, 19) and C(i,j) = A[i, j, B[i,j]]?
Essentially, I want to use B as an indexing matrix, where if B[i,j] = 1 I take A[i,j,1] to form C(i,... | Indexing tensor with binary matrix in numpy | 0 | 0 | 0 | 338 |
30,231,345 | 2015-05-14T07:06:00.000 | 0 | 1 | 0 | 1 | python,debian,raspberry-pi | 30,232,512 | 2 | false | 0 | 0 | you can not do this.
font size is determined by terminal emulator not program output. | 1 | 0 | 0 | How do I set font size for Python console application?
I'm running Debian Wheezy on a Raspberry Pi.
When the program is exited return to default size. | debian wheezy console application set font size | 0 | 0 | 0 | 153 |
30,233,406 | 2015-05-14T09:09:00.000 | -1 | 0 | 0 | 0 | python-2.7,caching,python-requests | 30,299,626 | 2 | true | 0 | 0 | For anyone else searching, the module that does the job is called "vcrpy". | 1 | 2 | 0 | Is there a way to "cache" the requests I make with the python "requests" module in a way that even if I go offline the module still returns the webpage as if I was online? How can I achieve something like this? Currently I only found caching libraries that just cache the webpage but you still have to be online... | Caching python web requests for offline use | 1.2 | 0 | 1 | 568 |
30,234,706 | 2015-05-14T10:14:00.000 | 0 | 0 | 0 | 0 | python,mysql,flask,sqlalchemy | 30,238,066 | 1 | false | 0 | 0 | If I understand correctly your from_date and to_date are just dates. If you set them to python datetime objects with the date/times you want your results between, it should work. | 1 | 0 | 0 | I am using sqlalchemy to query memory logs off a MySql database. I am using:
session.query(Memory).filter(Memmory.timestamp.between(from_date, to_date))
but the results after using the time window are still too many.
Now I want to query for results withing the time window, but filtered down by asking for entries logge... | How to query rows with a minute/hour step interval in SqlAlchemy? | 0 | 1 | 0 | 587 |
30,235,427 | 2015-05-14T10:49:00.000 | 0 | 0 | 1 | 1 | python,command-prompt,prompt | 30,237,541 | 2 | false | 0 | 0 | There are multiple ways to go about this. As Sir_FZ pointed out, the executables are already named python2.7, etc, so what you want already exists. If for some really odd reason you have more than one python2.7 in your $PATH, you can explicitly call /my/other/python2.7 etc. If you're lazy, you can even create alias'... | 1 | 0 | 0 | I have several python versions installed (and working properly on my machines). Isn't there a way to execute a specific version of python from the command line.
Say I want to use python 3.1. I am after something a SIMPLE COMMAND such as python3.1 or python31 that would be used as follows :python3.1 setup.py install, fo... | Select python version to execute from prompt | 0 | 0 | 0 | 79 |
30,238,648 | 2015-05-14T13:29:00.000 | 0 | 0 | 1 | 0 | python,multithreading | 30,239,341 | 1 | false | 0 | 0 | Because you can't be sure, when scheduler will switch threads. Consider SMP machine. It will always process one thread at a time. But nevertheless multithreaded code should use semaphores, mutexes, critical sections and other synchronization primitives.
Although CPython have GIL and can't execute more then one thread a... | 1 | 1 | 0 | Python threading module do not realize true parallel programming. Threads were switched one another. Then, is Semaphore necessary? Semaphore is for sending signal to other threads that should be processed at the same time. I think it is only useful in multiprocessing. Why is the Semaphore Class in threading module? | The need of semaphore in python threading module | 0 | 0 | 0 | 431 |
30,239,152 | 2015-05-14T13:51:00.000 | 36 | 0 | 1 | 0 | python,git,pip | 45,532,721 | 4 | false | 0 | 0 | Important to notice: you should not have whitespaces around or within brackets. I.e. this will work: -e ".[extra1,extra2]" but this won't: -e ". [extra1, extra2]" - and even as a row in requirements.txt file, where it is not so obvious. The worst thing about it is that when you have whitespace, extras are just silently... | 1 | 94 | 0 | How can one manage to install extras_requires with pip when installing from a git repository ?
I know that you can do pip install project[extra] when the project is on pypi.
And you have to do pip install -e git+https://github.com/user/project.git#egg=project for a git repo but I didn't manage to find how to link these... | Specify extras_require with pip install -e | 1 | 0 | 0 | 27,417 |
30,242,603 | 2015-05-14T16:36:00.000 | 0 | 0 | 0 | 0 | python,pandas | 30,242,748 | 1 | true | 0 | 0 | I believe the file you are loading is far to large reference what your computer can handle. Unless you need to load all the data at once, I would try to load the data based on what you need at that time e.g., load data based on a specific criteria then run your program over those specifics. This should help with the tw... | 1 | 0 | 1 | I am reading a 5 G file on my 8G memory MacBook : pd.read_csv(filepath).
I see the memory usage going to 12 G (orange, then red), and then suddenly the memory usage drops back to 6G, and then slowly goes back up.... And my script doesn't deliver anything, not even an exit error....
What can happen ? Seems like python... | Pandas is blocking python when it reads big file | 1.2 | 0 | 0 | 54 |
30,244,222 | 2015-05-14T18:02:00.000 | 1 | 1 | 1 | 0 | python,vim,python-import | 30,245,587 | 1 | true | 0 | 0 | Vim does not automatically search the current script's directory for imports, only some configured ones (cp. :help python-_get_paths), and the current working directory.
So, you either need to configure the current script's path, or simply :cd %:h to it (alternatively automatically via :set autochdir). | 1 | 1 | 0 | I am using gVim with Windows 7.
I am trying to run a python script using the pyfile % command, but every time I do so, I get ImportError: No module named libtcodpy
Checking the location of the libtcodpy, it is indeed in the same folder as the script I am trying to run. Furthermore, running the program with the python I... | gVim ImportErrror: module not found, even though module is in same folder as script | 1.2 | 0 | 0 | 62 |
30,249,063 | 2015-05-14T23:22:00.000 | 0 | 1 | 0 | 0 | python,linux,performance,ubuntu,analytics | 30,249,116 | 2 | false | 0 | 0 | If you just want to know how long a process takes to run the time command is pretty handy. Just run time <command> and it will report how much time it took to run with it counted in a few categories, like wall clock time, system/kernel time and user space time. This won't tell you anything about which parts of the sy... | 2 | 0 | 0 | I created a python script that grabs some info from various websites, is it possible to analyze how long does it take to download the data and how long does it take to write it on a file?
I am interested in knowing how much it could improve running it on a better PC (it is currently running on a crappy old laptop. | Is it possible to see what a Python process is doing? | 0 | 0 | 0 | 238 |
30,249,063 | 2015-05-14T23:22:00.000 | 0 | 1 | 0 | 0 | python,linux,performance,ubuntu,analytics | 30,249,196 | 2 | false | 0 | 0 | You can always store the system time in a variable before a block of code that you want to test, do it again after then compare them. | 2 | 0 | 0 | I created a python script that grabs some info from various websites, is it possible to analyze how long does it take to download the data and how long does it take to write it on a file?
I am interested in knowing how much it could improve running it on a better PC (it is currently running on a crappy old laptop. | Is it possible to see what a Python process is doing? | 0 | 0 | 0 | 238 |
30,250,032 | 2015-05-15T01:19:00.000 | 0 | 0 | 0 | 0 | python,django,superuser | 71,642,770 | 3 | false | 1 | 0 | The password is usually hidden in your IDE so it is not showing up when you're typing it out.
Just type the password press enter and re-enter the same thing.
Hope this solves the problem. | 2 | 1 | 0 | I am learning django, and I have a mysite folder. When I synced the database it prompted me to create a superuser. I typed yes, and got halfway through the forms but I couldn't enter any characters when it wanted a password. I searched google and found:
python manage.py createsuperuser
The same thing happened, I co... | Django createsuperuser cannot enter password | 0 | 0 | 0 | 3,933 |
30,250,032 | 2015-05-15T01:19:00.000 | -1 | 0 | 0 | 0 | python,django,superuser | 70,849,579 | 3 | false | 1 | 0 | Operations to perform:
Apply all migrations: admin, admin_interface, auth, contenttypes, myapp, sessions
Running migrations:
Applying myapp.0002_alter_student_id... | 2 | 1 | 0 | I am learning django, and I have a mysite folder. When I synced the database it prompted me to create a superuser. I typed yes, and got halfway through the forms but I couldn't enter any characters when it wanted a password. I searched google and found:
python manage.py createsuperuser
The same thing happened, I co... | Django createsuperuser cannot enter password | -0.066568 | 0 | 0 | 3,933 |
30,250,282 | 2015-05-15T01:52:00.000 | 18 | 0 | 1 | 0 | python,object,collections,attributes,member | 30,250,337 | 4 | false | 0 | 0 | . is used for accessing attributes (including methods). [] is used for accessing what are called "items", which typically are the contents of various kinds of container objects.
JavaScript does not distinguish these two things, but Python does. You are correct that [] is used for accessing the data in a list or dict.... | 1 | 59 | 0 | I come from a Javascript background (where properties can be accessed through both . and [] notation), so please forgive me, but what, exactly, is the difference between the two in Python?
From my experimentation it seeems that [] should always be used, both to get the index of a list or set and to get the value from a... | What's the difference between the square bracket and dot notations in Python? | 1 | 0 | 0 | 28,003 |
30,252,726 | 2015-05-15T06:14:00.000 | 1 | 0 | 0 | 0 | python,django,pdf,pisa | 30,345,810 | 2 | false | 1 | 0 | I did few changes in html which results pisa.createPDF works fast for me.
I am using html of almost 2 MB, contains single table with almost more than 10,000 rows. So I break them into multiple tables and tried again. Its surprised me, initially with single table it took almost 40 minutes (2590 seconds) to generate PDF ... | 1 | 2 | 0 | I am generating pdf using html template with python pisa.CreatePDF API,
It works well with small html, but in case of huge html it takes lot of time. Is there any alternative ? | pisa.CreatePDF hangs with huge html file | 0.099668 | 0 | 0 | 1,230 |
30,252,859 | 2015-05-15T06:24:00.000 | 1 | 0 | 1 | 0 | python,multithreading,greenlets | 31,060,865 | 1 | false | 0 | 0 | Greenlets stay within a single thread in Python. They cannot jump into another thread. So if your code is properly thread-safe, it will be greenlet safe.
Another way to look at it is that greenlets execute only one at a time, so you have very little issues like you have with threads. | 1 | 0 | 0 | The situation I have in mind is using a python extension module that can call back into python, so that there may be a mixture of python and non-python stack frames at the point when a greenlet yields.
I assume that if a module uses thread-local storage it is likely to misbehave with greenlets.
Is there any other reaso... | Does thread-safe generally imply greenlet-safe in Python? | 0.197375 | 0 | 0 | 610 |
30,253,976 | 2015-05-15T07:32:00.000 | 0 | 0 | 0 | 0 | python,csv,pandas,pickle | 30,254,159 | 4 | false | 0 | 0 | Dont load 800MB file to memory. It will increase your loading time. Pickle objects too takes more time to load. Instead store the csv file as a sqlite3 (which comes along with python) table. And then query the table every time depending upon your need. | 1 | 5 | 1 | I am reading a 800 Mb CSV file with pandas.read_csv, and then use the original Python pickle.dump(datfarame) to save it. The result is a 4 Gb pkl file, so the CSV size is multiplied by 5.
I expected pickle to compress data rather than extend it. Also because I can do a gzip on the CSV file which compress it to 200 Mb,... | Pickling pandas dataframe multiplies by 5 the file size | 0 | 0 | 0 | 7,611 |
30,255,307 | 2015-05-15T08:51:00.000 | 2 | 0 | 1 | 0 | python | 30,255,380 | 2 | false | 0 | 0 | To quote the documentation:
Return the size of an object in bytes. The object can be any type of object. All built-in objects will return correct results, but this does not have to hold true for third-party extensions as it is implementation specific.
Built in strings are not simple character sequences - they are ful... | 1 | 2 | 0 | What does sys.getsizeof return for a standard string? I am noticing that this value is much higher than what len returns. | What does python sys getsizeof for string return? | 0.197375 | 0 | 0 | 5,866 |
30,261,689 | 2015-05-15T14:12:00.000 | 2 | 0 | 1 | 0 | python,spyder | 30,276,162 | 1 | false | 0 | 0 | The consoles both python and ipython, when executing code have a stop button in the top right corner of the panes.
The debug button has no business with that as you rightly said it is for debugging, so unless you are debugging you should not expect it to stop a non debugging session. | 1 | 4 | 0 | I'd like to stop code while running in Spyder, but ctrlc/ ctrlz nor cmdc/ cmdz does not work for me, even the blue stop button (normally used for debug).
I work under Yosemite 10.10.3 and am using Spyder 2.3.4 and Python 2.7
Has someone encountered the same issue? | Stopping running code | 0.379949 | 0 | 0 | 17,571 |
30,261,701 | 2015-05-15T14:12:00.000 | 1 | 1 | 0 | 0 | python,unix,path | 30,261,822 | 2 | true | 0 | 0 | Python doesn't share its own path with the general $PATH, so to be able to do what you're looking for, you must add your scripts in the $PYTHONPATH instead. | 1 | 0 | 0 | I have a collection of python scripts that import from each other. If I want to use these in a location where the scripts are not physically present, how can I do this. I tried adding the path of the dir with the scripts to my $PATH but got no joy. Any help appreciated, thanks. | Calling python scripts from anywehre | 1.2 | 0 | 0 | 52 |
30,264,100 | 2015-05-15T16:10:00.000 | 0 | 0 | 1 | 0 | python,virtualenv,zipline | 45,375,832 | 3 | false | 0 | 0 | These are the Requirements/ Steps to Make Zipline Work:
Install Microsoft Visual C++ 2010 Express
Download and install python 3.4
Download zipline from github and Extract in C:/
Set Anaconda as project interpreter
Since zipline is compatible with Python 3.4, you need to create an environment with Python 3.4
Run this c... | 2 | 3 | 0 | I installed zipline package via Enthought Cantopy. Now I try to run a script using it in command prompt, but get error ImportError: No module named zipline.
I also tried to run the same code using IPython, with the same output.
I think it is related to python virtual environments, but don't know how to fix that. | zipline error. No module named zipline | 0 | 0 | 0 | 2,894 |
30,264,100 | 2015-05-15T16:10:00.000 | 2 | 0 | 1 | 0 | python,virtualenv,zipline | 30,345,896 | 3 | true | 0 | 0 | I figured it out. The problem was in the version of python I have. I have 32-bit python and Enthought Cantopy with 64 bit python, installed zipline package was under 64 bit python while command prompt was using 32 bit version. Installing 64 bit python fixed the issue. | 2 | 3 | 0 | I installed zipline package via Enthought Cantopy. Now I try to run a script using it in command prompt, but get error ImportError: No module named zipline.
I also tried to run the same code using IPython, with the same output.
I think it is related to python virtual environments, but don't know how to fix that. | zipline error. No module named zipline | 1.2 | 0 | 0 | 2,894 |
30,265,151 | 2015-05-15T17:12:00.000 | 0 | 0 | 1 | 0 | python,matplotlib,six | 30,265,202 | 1 | false | 0 | 0 | You can install the package by running pip install six-1.9.0.tar.gz which requires you to copy six-1.9.0.tar.gz to the machine somehow. | 1 | 0 | 0 | I am trying to install matplotlib on my lab computer that does not have internet access. Since it requires six for its full implementation, I am unable to run the scripts that has matplotlib module.
I know how to install six by using pip but am stuck when there is no internet access.
Thanks in advance! | is there a way to install six if I do not have access to internet? | 0 | 0 | 0 | 237 |
30,267,236 | 2015-05-15T19:21:00.000 | 1 | 0 | 0 | 1 | python,django,celery | 30,300,802 | 1 | true | 1 | 0 | If you want to run chains at once you will need to run more than one worker. | 1 | 0 | 0 | I have Celery tasks chain that I call with apply_async. Each task in chain depends on the result from previous task.
Basically the worklof looks like this:
Fetch data from DB.
For each fetched row run chain with tasks.
Behaviour that I want to achieve is to run multiple chains at one time. But it seems like it runs t... | Run multiple Celery chains at the same time | 1.2 | 0 | 0 | 678 |
30,270,075 | 2015-05-15T23:10:00.000 | 0 | 0 | 0 | 0 | python-2.7 | 35,987,562 | 1 | false | 0 | 0 | Observing the error: 'Failed to connect to localhost port 4000: Connection timed out'). Are you sure the domains/url you are trying to connect is not including localhost or a domain that resolves to localhost (i.e. 127.0.0.1)? Also port 4000 is not the typical port you will find a web server listening on. | 1 | 0 | 0 | I'm making several requests using threads and I am not interested in the delay required to get the responses.
The most important thing for me is the reception of the response.
I put these values (all the bigger ones return errors):
c.setopt (pycurl.CONNECTTIMEOUT ,3600000000000000000)
c.setopt (pycurl.TIMEOUT,36000000... | Connection timed out (pycurl) | 0 | 0 | 1 | 259 |
30,270,229 | 2015-05-15T23:36:00.000 | 3 | 0 | 1 | 0 | python,copy-on-write | 30,270,254 | 2 | true | 0 | 0 | Python has only 1 copy of each immutable object, no matter how many variables you have referring to it. When using said string as an argument to another function, you're only passing that reference to it. When you say "modify" what happens is python just changes that reference (also creating the new string if it wasn't... | 1 | 1 | 0 | When I pass a string to a function, does python copy the whole string to a new memory location or does it wait until I try to modify the string from inside the function?
Thanks :) | Does python use copy-on-write when passing an immutable variable to a function? | 1.2 | 0 | 0 | 321 |
30,272,764 | 2015-05-16T06:58:00.000 | 0 | 1 | 0 | 0 | python,sendkeys | 31,356,253 | 1 | true | 0 | 0 | It is possible using ctypes.
It can be implemented in win32 apis | 1 | 0 | 0 | In python, I'm using SendKey module to perform "key down"
My curiosity starts with pressing speed.
When using SendKey, it presses with machine speed. I want to program it to slow down like human speed. Is it possible in Python? | How to program "key down"s speed programmatically?(Python) | 1.2 | 0 | 0 | 86 |
30,278,054 | 2015-05-16T16:26:00.000 | 1 | 0 | 0 | 1 | python,redis,rabbitmq,celery,message-queue | 30,282,486 | 3 | false | 1 | 0 | Can your tasks in stage 2 check whether the work has already been done and, if it has, then not do the work again? That way, even though your task list will grow, the amount of work you need to do won't.
I haven't come across a solution re the sets / lists, and I'd think there were lots of other ways of getting around ... | 1 | 8 | 0 | I'm wondering if there's a way to set up RabbitMQ or Redis to work with Celery so that when I send a task to the queue, it doesn't go into a list of tasks, but rather into a Set of tasks keyed based on the payload of my task, in order to avoid duplicates.
Here's my setup for more context:
Python + Celery. I've tried Ra... | Distributed Task Queue Based on Sets as a Data Structure instead of Lists | 0.066568 | 0 | 0 | 656 |
30,278,630 | 2015-05-16T17:22:00.000 | 0 | 0 | 0 | 0 | python,csv | 30,278,960 | 1 | false | 0 | 0 | It turns out there was just a problem in the csv file. What happened was that I was running the same file, which caused another header row to be entered. When there is more then one header row, the script tries to convert something like "ind_sharpe" into a float which obviously will not work, and breaks the program.
Th... | 1 | 0 | 1 | I have a Python script that writes and reads multiple CSV files. On OS X, in order to perform any calculations on any values in the CSV file, I have to float the value float(d['var_returns']). This works perfectly fine on OS X and the entire script works as performed.
However, using the exact same code on Windows, I ge... | Python reads CSV on OS X differently then Windows? | 0 | 0 | 0 | 32 |
30,279,549 | 2015-05-16T18:53:00.000 | 0 | 0 | 1 | 0 | python,binary-tree,min-heap | 30,279,570 | 3 | false | 0 | 0 | Yes, None is considered a mean-heap tree. | 2 | 1 | 0 | I need to write a recursion for a min-heap binary tree to check if this tree is min-heap. One of the test cases is just NONE.
Is None considered a min-heap tree and returns True, or None is False?
The reason I am asking is that I will reach leaves at some point and their nodes are None and if base case is True then it ... | Is binary tree that is just None can be considered a min-heap tree? | 0 | 0 | 0 | 267 |
30,279,549 | 2015-05-16T18:53:00.000 | 1 | 0 | 1 | 0 | python,binary-tree,min-heap | 30,279,572 | 3 | false | 0 | 0 | I believe that a none type will be vacuously true as it does not violate the definition of a min-heap tree. | 2 | 1 | 0 | I need to write a recursion for a min-heap binary tree to check if this tree is min-heap. One of the test cases is just NONE.
Is None considered a min-heap tree and returns True, or None is False?
The reason I am asking is that I will reach leaves at some point and their nodes are None and if base case is True then it ... | Is binary tree that is just None can be considered a min-heap tree? | 0.066568 | 0 | 0 | 267 |
30,279,783 | 2015-05-16T19:19:00.000 | 4 | 0 | 0 | 0 | python,python-3.x,apache-spark | 30,279,862 | 5 | false | 0 | 0 | Have a look into the file. The shebang line is probably pointed to the 'env' binary which searches the path for the first compatible executable.
You can change python to python3. Change the env to directly use hardcoded the python3 binary. Or execute the binary directly with python3 and omit the shebang line. | 3 | 99 | 1 | I built Spark 1.4 from the GH development master, and the build went through fine. But when I do a bin/pyspark I get the Python 2.7.9 version. How can I change this? | Apache Spark: How to use pyspark with Python 3 | 0.158649 | 0 | 0 | 93,816 |
30,279,783 | 2015-05-16T19:19:00.000 | 155 | 0 | 0 | 0 | python,python-3.x,apache-spark | 32,094,874 | 5 | false | 0 | 0 | Just set the environment variable:
export PYSPARK_PYTHON=python3
in case you want this to be a permanent change add this line to pyspark script. | 3 | 99 | 1 | I built Spark 1.4 from the GH development master, and the build went through fine. But when I do a bin/pyspark I get the Python 2.7.9 version. How can I change this? | Apache Spark: How to use pyspark with Python 3 | 1 | 0 | 0 | 93,816 |
30,279,783 | 2015-05-16T19:19:00.000 | 9 | 0 | 0 | 0 | python,python-3.x,apache-spark | 38,938,668 | 5 | false | 0 | 0 | 1,edit profile :vim ~/.profile
2,add the code into the file: export PYSPARK_PYTHON=python3
3, execute command : source ~/.profile
4, ./bin/pyspark | 3 | 99 | 1 | I built Spark 1.4 from the GH development master, and the build went through fine. But when I do a bin/pyspark I get the Python 2.7.9 version. How can I change this? | Apache Spark: How to use pyspark with Python 3 | 1 | 0 | 0 | 93,816 |
30,280,460 | 2015-05-16T20:32:00.000 | 2 | 1 | 0 | 1 | python,google-app-engine,google-cloud-storage | 30,280,609 | 2 | false | 1 | 0 | A cron job in GAE has to hit a URL, there's no other way to do it. That's just how the system is designed.
But since you have control over app.yaml anyway, you can easily assign your script to a URL there. | 1 | 0 | 0 | my end goal is to update Google cloud storage with some json data and I would rather it run a script rather than hitting a url endpoint. What would be the proper configuration of cron.yaml if, let's say the script were to sit right next to app.yaml? | Is there a way to run a Google App engine cron task without hitting an endpoint but rather pointing cron.yaml at a python script? | 0.197375 | 0 | 0 | 622 |
30,280,774 | 2015-05-16T21:06:00.000 | 0 | 0 | 0 | 0 | python,linux,multithreading,gtk,pox | 30,397,459 | 1 | false | 0 | 1 | I was able to solve the problem by spawning separate threads for both GTK and the POX controller. With this done, everything's working fine simultaneously. | 1 | 0 | 0 | I'm trying to create a simple Python application for Linux and I'm using GTK to generate a UI for it. I've only begun exploring GTK but from what I can tell, the moment you call GTK.main() the program goes into that function wherever and only responds to user interactions with the UI. The thing is, I'm running an SDN c... | Keep background events active when using GTK | 0 | 0 | 0 | 69 |
30,281,349 | 2015-05-16T22:19:00.000 | 0 | 0 | 0 | 0 | python,urllib2 | 30,281,634 | 1 | true | 0 | 0 | The problem seemed to be solved by a combination of Ajay's comment:
Try after installing this pip install pyopenssl ndg-httpsclient pyasn1 if you are using python2
and the OS X Yosemite version of DNS cache flushing:
sudo discoveryutil mdnsflushcache | 1 | 0 | 0 | I'm querying the Mixpanel API pretty consistently, but every so often, the request does not go through and I am given this error:
urllib2.URLError: <urlopen error [Errno 8] nodename nor servname provided, or not known>
I did some searching and there might be some caching issues, so I tried this in terminal:
dscacheutil... | urllib2 request randomly stops working without code changes | 1.2 | 0 | 1 | 126 |
30,286,986 | 2015-05-17T12:43:00.000 | 1 | 0 | 0 | 0 | python,pydoc | 30,287,331 | 2 | true | 1 | 0 | I ended up just switching to epydoc, which is much more featureful than pydoc. Sphinx is another alternative. | 1 | 0 | 0 | In javadoc, you can have tags like @author, @return, @deprecated which are handled specially when making java documentation. Is there an equivalent functionality in pydoc or am I limited to just a verbatim copy of the method's docstring? | Equivalent of javadoc's tags in pydoc | 1.2 | 0 | 0 | 1,176 |
30,289,423 | 2015-05-17T16:45:00.000 | 0 | 0 | 0 | 0 | python,django,django-messages | 30,289,765 | 1 | true | 1 | 0 | It depends. You could save your messages in the database if you need the classical approach to messages. This would best work for messages sent in e-mail or bulletin board "style".
If however you need real-time behavior and lots of messages, having a database inbetween might slow things down a bit. You could use node.j... | 1 | 0 | 0 | I want to make my own on Django-app. The app must have an messages-application not only for notification but for chatting between users.
So, for example I've write a model for messages, so where I have to save the messages? In the database, or maybe it is not a good style of coding and bad for work speed? | Where to save messages in Django app? | 1.2 | 0 | 0 | 435 |
30,292,625 | 2015-05-17T22:03:00.000 | 0 | 0 | 0 | 0 | python,css,django,pdf,weasyprint | 30,314,963 | 1 | true | 1 | 0 | Found the solution. It was a CSS problem. The class used to style the body was not at the beginning of the css file and that caused erratic behavior with other styles declared before it. | 1 | 0 | 0 | I'm using Weasyprint to print an HTML template to PDF, and I keep getting a gap of 10cm on the right side.
I'm using @page:(size:letter;) as only page attribute.
I've tried setting the page size manually, but I still keep getting a huge space to the right of all the pages.
Any thoughts on what could be the problem? | Weasyprint HTML to PDF huge gap in right margin | 1.2 | 0 | 0 | 1,861 |
30,292,884 | 2015-05-17T22:39:00.000 | 2 | 0 | 1 | 1 | python,azure,cloud,bigdata,azure-virtual-machine | 30,571,753 | 1 | true | 0 | 0 | There is no additional steps to do in comparison to Your own. local server. Linux on Azure is a standard Linux machine. If You are looking for step-by-step hopw to on running Linux VM on Azure, just search on azure.com and You will find it. I think You will not have any problems even without documentation. Azure portal... | 1 | 2 | 0 | I'll have a linux machine with a virtual machine installed for Microsoft azure soon. I need to run some data mining/graph analysis algorithms on the azure because I work with big data. I don't want to use azure machine learning stuff. just want to run my own python code. What are the steps? If needed, hoe can I install... | Running python script on Microsoft Azure | 1.2 | 0 | 0 | 4,731 |
30,295,848 | 2015-05-18T05:43:00.000 | 3 | 0 | 1 | 0 | python,file,pandas,permissions | 30,296,559 | 3 | true | 0 | 0 | Better give the complete path for your output csv file. May be that you are checking in a wrong folder. | 1 | 1 | 1 | I am running the following: output.to_csv("hi.csv") where output is a pandas dataframe.
My variables all have values but when I run this in iPython, no file is created. What should I do? | How to write .csv file in Python? | 1.2 | 0 | 0 | 3,754 |
30,297,785 | 2015-05-18T07:52:00.000 | 7 | 0 | 0 | 0 | python,django,authentication | 30,298,038 | 2 | true | 1 | 0 | I think you should use cookies.
When a user that is not authenticated makes a request, look for a cookie named whatever ("nonuserid" in this case). If the cookie is not present it means it's a new user so you should set the cookie with a random id. If it's present you can use the id in it to identificate the anonymous ... | 1 | 8 | 0 | I want to create a table(postgres) that stores data about what items were viewed by what user. authenticated users are no problem but how can I tell one anonymous user from another anonymous user? This is needed for analysis purposes.
maybe store their IP address as unique ID? How can I do this? | how to give some unique id to each anonymous user in django | 1.2 | 1 | 0 | 4,523 |
30,302,766 | 2015-05-18T12:04:00.000 | 1 | 0 | 1 | 0 | python,unicode | 30,302,821 | 7 | false | 0 | 0 | For a given codepoint, you can use unicodedata.name. To get them all, you can work through all the billions to see which have such names. | 2 | 8 | 0 | In Python I can print a unicode character by name (e.g. print(u'\N{snowman}')). Is there a way I get get a list of all valid names? | List of unicode character names | 0.028564 | 0 | 0 | 7,360 |
30,302,766 | 2015-05-18T12:04:00.000 | 0 | 0 | 1 | 0 | python,unicode | 54,364,764 | 7 | false | 0 | 0 | If you want to insert a unicode character by name, but don't know the name. Here is how you get an easy overview of unicode character names.
On Windows
Open "Character Map" (search for charmap.exe and run it).
Select any common Microsoft font (these tend to have a wide variety of unicode characters defined).
Click on... | 2 | 8 | 0 | In Python I can print a unicode character by name (e.g. print(u'\N{snowman}')). Is there a way I get get a list of all valid names? | List of unicode character names | 0 | 0 | 0 | 7,360 |
30,304,650 | 2015-05-18T13:34:00.000 | -2 | 0 | 1 | 0 | python,pprint | 35,257,151 | 1 | false | 0 | 0 | You can change the way an object is printed by overriding the __repr__() method on its class.
Python will allow you to override the repr of any class, so use it with care. | 1 | 6 | 0 | Can I have pretty printed data output as in pprint.pprint (new lines, indentation), but also shortened lists as in reprlib.repr at the same time?
An ugly hack seems to be pprint(eval(reprlib.repr(data))), but is there a better way? | Combine reprlib and pprint in Python? | -0.379949 | 0 | 0 | 555 |
30,315,466 | 2015-05-19T01:47:00.000 | 0 | 0 | 0 | 0 | python,pygame | 30,315,673 | 2 | true | 0 | 1 | Not sure if this is the problem, but the stretching might be caused by not redrawing the background. Blitting is like painting, you can't erase stuff. When you want to move something, you need to repaint all the places that have changed - also the background that is not visible after movement.
The quickest way to do th... | 1 | 0 | 0 | I've got my own drawing loaded on to the screen and scaled it to the size I want, but the background of the program I used to make the drawing is still on the image. I noticed that when I move the image, the background doesn't move with the picture, but it actually looks like it's stretching out and it will cover where... | Getting my drawing into pygame without .blit() | 1.2 | 0 | 0 | 79 |
30,317,213 | 2015-05-19T05:12:00.000 | 4 | 0 | 1 | 1 | python,rpm | 30,325,775 | 2 | false | 0 | 0 | The *.pyc and *.pyo are being automagically compiled by helper scripts in rpm.
The simplest way to disable is to add "exit 0" at the end of the %install section to disable the running of the helper scripts
Otherwise you will need to change your build configuration and redefine the macros that are being appended to the ... | 1 | 3 | 0 | I have a proxy written in python. I want to create an RPM for this. This rpm will just place the appropriate files at their location. and then some python server will pick them.
Now my question is that whenever I generate the rpm, I am getting .pyo and .pyc files as well for every .py file. I don't need those pyc and p... | How to remove .pyo anc .pyc from an RPM? | 0.379949 | 0 | 0 | 5,993 |
30,317,965 | 2015-05-19T06:11:00.000 | 27 | 0 | 1 | 0 | python,decorator,mixins,python-decorators | 30,318,081 | 1 | true | 0 | 0 | In my opinion, you need mixins when you have a few different classes that should have same functionality.
Good examples of using mixins are Django's class-based views. For example, you have a few different classes: FormView, TemplateView, ListView. All of them have one similar piece of functionality: they have to rende... | 1 | 24 | 0 | I have understood the basics of decorators and mixins. Decorators add a new functionality to an object without changing other object instances of the same class, while a mixin is a kind of multiple inheritance used to inherit from multiple parent classes.
Does it mean that decorators should be used when you'd need to ... | Python: Use of decorators v/s mixins? | 1.2 | 0 | 0 | 4,205 |
30,318,168 | 2015-05-19T06:24:00.000 | 0 | 0 | 0 | 1 | python,linux,ubuntu,cron,crontab | 30,319,952 | 5 | false | 0 | 0 | If all you want to do is reset the content of user crontab file , then just remove the crontab file (or overwrite with your default) , and reload the cron service . | 2 | 2 | 0 | We know the crontab command is used for scheduled tasks in Linux.
I want to write a Python script. Its function is to receive some data (these data are related to crontab setting) and execute a 'crontab' command in order to reset the content of the user's crontab file.
I know how to execute external Linux commands in P... | Python: How to handle 'crontab' command? | 0 | 0 | 0 | 6,083 |
30,318,168 | 2015-05-19T06:24:00.000 | 0 | 0 | 0 | 1 | python,linux,ubuntu,cron,crontab | 30,319,851 | 5 | false | 0 | 0 | You could/should first dump your current crontab with crontab -l, edit it the way you want (e. g. add some lines, or modify) and then install the new one.
This usually works with crontab <filename>, but should as well work with crontab - and then piping the new contents into the process's stdin. | 2 | 2 | 0 | We know the crontab command is used for scheduled tasks in Linux.
I want to write a Python script. Its function is to receive some data (these data are related to crontab setting) and execute a 'crontab' command in order to reset the content of the user's crontab file.
I know how to execute external Linux commands in P... | Python: How to handle 'crontab' command? | 0 | 0 | 0 | 6,083 |
30,320,265 | 2015-05-19T08:20:00.000 | 0 | 0 | 1 | 0 | python,django,heroku,version | 30,321,377 | 4 | false | 1 | 0 | If you didn't have access to source code, from headers I can see that server is using Gunicorn 0.17.2, which is compatible with Python 2.x >= 2.6, which rules out i.e. Python 3. | 1 | 1 | 0 | We run a site called inteokej.nu and I need to find out which version of Python it runs on. I have pulled all the files to my computer but I don't know if and how I can find out the version number from them? The site is hosted on Heroku and maybe there's a way to find out the version with some kind of Heroku command?
A... | Find out Python version from source code (or Heroku) | 0 | 0 | 0 | 1,237 |
30,322,307 | 2015-05-19T09:54:00.000 | -1 | 0 | 1 | 0 | python,datetime | 30,322,638 | 3 | false | 0 | 0 | Use the classmethod of datetime.strptime(date_string, format). This will return a datetime corresponding to date_string, parsed according to format. | 1 | 0 | 0 | I have a string "Monday, May 18, 2015". I want to convert it into datetime fromat of python keeping the format same. I mean exact replica of the string but the type changed to datetime. How can I do that? | Convert string to date time in specified format | -0.066568 | 0 | 0 | 494 |
30,322,964 | 2015-05-19T10:24:00.000 | 3 | 0 | 0 | 0 | python,rrdtool,rrd | 30,339,442 | 1 | true | 0 | 0 | Under RRDTool 1.4 and earlier, you cannot add a DS or an RRA to an existing RRD file without recreating it. The newly-released RRDTool 1.5 has the ability to add new DS and RRA using the rrdtool tune subcommand, but this may not yet have Python bindings available in your OS.
With 1.4, the only way to add a new RRA is ... | 1 | 1 | 0 | I am using RRD for monitoring. In the current RRD files are not all archives present that I want to use in the future. How do I add RRA's to an existing RRD? I'm writing a Python (1.4.7) script using rrdpython.
I only find the option for dumping it to XML, adding the archives and restoring it again. But that doesn't so... | How can I add RRA's to an existing RRD? | 1.2 | 0 | 0 | 1,150 |
30,323,607 | 2015-05-19T10:52:00.000 | 2 | 0 | 1 | 0 | python | 30,323,639 | 2 | false | 0 | 0 | The __init__.py has two main functions:
Marking packages: It marks a directory as a Python package, and the inner .py files as Python modules.
Initialization code: As its name suggests, any code inside the __init__.py is automatically executed when the package is imported. This is the right place to run initialization... | 1 | 3 | 0 | I can import from subdirectories with a blank __init__.py file. That works fine. I think that init file in python works like an index file. But I really don't understand why the __init__.py file is blank to import. How do __init__.py file and importing really work?
What have to be __init__.py files content? | Why do I have to add a blank __init__.py file to import from subdirectories | 0.197375 | 0 | 0 | 4,036 |
30,324,370 | 2015-05-19T11:29:00.000 | 2 | 0 | 0 | 0 | python,oracle,cx-oracle | 30,324,469 | 5 | true | 0 | 0 | If is possible to export your excel fila as a CSV, then all you need is to use sqlldr to load the file in db | 3 | 4 | 0 | I have a 3+ million record XLS file which i need to dump in Oracle 12C DB (direct dump) using a python 2.7.
I am using Cx_Oracle python package to establish connectivity to Oracle , but reading and dumping the XLS (using openpyxl pckg) is extremely slow and performance degrades for thousands/million records.
From a scr... | loading huge XLS data into Oracle using python | 1.2 | 1 | 0 | 4,256 |
30,324,370 | 2015-05-19T11:29:00.000 | 0 | 0 | 0 | 0 | python,oracle,cx-oracle | 30,328,198 | 5 | false | 0 | 0 | Excel also comes with ODBC support so you could pump straight from Excel to Oracle assuming you have the drivers. That said, anything that involves transforming a large amount of data in memory (from whatever Excel is using internally) and then passing it to the DB is likely to be less performant than a specialised bul... | 3 | 4 | 0 | I have a 3+ million record XLS file which i need to dump in Oracle 12C DB (direct dump) using a python 2.7.
I am using Cx_Oracle python package to establish connectivity to Oracle , but reading and dumping the XLS (using openpyxl pckg) is extremely slow and performance degrades for thousands/million records.
From a scr... | loading huge XLS data into Oracle using python | 0 | 1 | 0 | 4,256 |
30,324,370 | 2015-05-19T11:29:00.000 | 0 | 0 | 0 | 0 | python,oracle,cx-oracle | 63,836,641 | 5 | false | 0 | 0 | Automate the export of XLSX to CSV as mentioned in a previous answer. But, instead of then calling a sqlldr script, create an external table that uses your sqlldr code. It will load your table from the CSV each time the table is selected from. | 3 | 4 | 0 | I have a 3+ million record XLS file which i need to dump in Oracle 12C DB (direct dump) using a python 2.7.
I am using Cx_Oracle python package to establish connectivity to Oracle , but reading and dumping the XLS (using openpyxl pckg) is extremely slow and performance degrades for thousands/million records.
From a scr... | loading huge XLS data into Oracle using python | 0 | 1 | 0 | 4,256 |
30,324,638 | 2015-05-19T11:41:00.000 | 3 | 0 | 1 | 0 | python,file,seek | 30,324,707 | 4 | false | 0 | 0 | Assuming the file isn't too big and memory isn't a concern
open('file.txt').readlines()[-2] | 1 | 1 | 0 | I am wondering if there is a simple way to get to the penultimate line of an open file. f.seek is giving me no end of trouble. I can easily get to the final line, but I can't figure out how to get to the line above that. | Printing to the penultimate line of a file | 0.148885 | 0 | 0 | 490 |
30,324,761 | 2015-05-19T11:47:00.000 | 0 | 0 | 0 | 0 | python,django,windows-7-x64 | 30,326,360 | 1 | true | 1 | 0 | To Summarize the comments:
This is because you're in c:\Windows\system32. By default when you open command prompt is in that system32 directory. you need to change it first. To change directory use cd <what path you want>.
Once you're in the correct directory, you can start the project with django-admin startproject c... | 1 | 0 | 0 | I am currently learning how to use Python/Django. I have successfully installed and setup Django. I am experiencing problems creating a project using the django-admin startproject mysite command. I have executed the command from command prompt using the path: C:\Python34\Scripts\django-admin startproject mysite I tried... | Django - Cannot find Directory 'mysite' | 1.2 | 0 | 0 | 1,391 |
30,325,959 | 2015-05-19T12:42:00.000 | 1 | 0 | 1 | 0 | c#,python,mobile,xamarin | 30,330,288 | 2 | false | 0 | 0 | You cannot. Xamarin has built bindings from C#/.NET to the underlying languages and runtimes on iOS and Android. That is what it provides for you; you don't have to code in Objective-C or Java but can use C# and get more reuse. | 1 | 2 | 0 | I have a existing application and the code was written in Python. Now i am developing a Mobile application using Xamarin. Now I want to use the same existing application code written in Python to develop my mobile apps from Xamarin.
How can I use Python from Xamarin. | How to use Python from Xamarin | 0.099668 | 0 | 0 | 10,017 |
30,329,286 | 2015-05-19T15:01:00.000 | 7 | 0 | 1 | 0 | python,pointers,memory,memory-management | 34,317,823 | 1 | true | 0 | 0 | This was answered in the comments through a discussion between me and SuperBiasedMan. The size of a reference in Python is the same as the word size for the CPU. So, it's 4 bytes on a 32bit build of python, and 8 bytes on 64bit python. | 1 | 9 | 0 | I have a project that I am planning, and one bit of information I'll want to have is how much memory a reference takes up in Python. AFAIK, a reference in python is the same as a pointer, and I am guessing that it would be the same size as a 32bit or 64bit pointer (but I could be wrong).
Could anyone clear this up for... | Python: Size of Reference? | 1.2 | 0 | 0 | 2,928 |
30,329,528 | 2015-05-19T15:12:00.000 | 2 | 0 | 0 | 0 | python,database,sqlite | 30,329,701 | 2 | true | 0 | 0 | use the pragma table_info(spamtable) command. The table names will be index 1 of the returned tuples. | 1 | 1 | 0 | Sorry for the rookie question. I have a sqlite file and I need to get table column names. How can I get them? | How to get list of column names of a sqlite db file | 1.2 | 1 | 0 | 696 |
30,330,543 | 2015-05-19T15:58:00.000 | 1 | 1 | 0 | 0 | python,wifi,tethering | 30,333,512 | 2 | false | 0 | 0 | Normally not - from the computer's prospective the tethered cell phone is simply just another wifi router/provider.
You might be able to detect some of the phone carrier networks from the traceroute info to some known servers (DNS names or even IP address ranges of network nodes - they don't change that often).
If you ... | 1 | 1 | 0 | I was wondering if there is a way to detect, from a python script, if the computer is connected to the internet using a tethered cell phone?
I have a Python script which runs a bunch of network measurement tests. Ideally, depending on the type of network the client is using (ethernet, wifi, LTE, ...) the tests should c... | Detect if connected to the internet using a tethered phone in Python | 0.099668 | 0 | 1 | 605 |
30,331,208 | 2015-05-19T16:28:00.000 | 4 | 0 | 0 | 0 | python,matplotlib | 30,336,990 | 2 | true | 0 | 0 | Calling the locator for the colorbar instance should return the tick locations.
colorbar.locator(). | 2 | 5 | 1 | I am using a colorbar in matplotlib and because I want my graph to be more sensitive I take the square root of each value. This gives me square rooted values on my colorbar, but now I want to scale the ticks labels back to the real values. I am thusly having a hard time doing. I see that colorbar has a set_ticks funct... | Get Colorbar Ticks | 1.2 | 0 | 0 | 984 |
30,331,208 | 2015-05-19T16:28:00.000 | 0 | 0 | 0 | 0 | python,matplotlib | 49,789,479 | 2 | false | 0 | 0 | In matplotlib 2.1 you may use method colorbar.get_ticks(). | 2 | 5 | 1 | I am using a colorbar in matplotlib and because I want my graph to be more sensitive I take the square root of each value. This gives me square rooted values on my colorbar, but now I want to scale the ticks labels back to the real values. I am thusly having a hard time doing. I see that colorbar has a set_ticks funct... | Get Colorbar Ticks | 0 | 0 | 0 | 984 |
30,332,159 | 2015-05-19T17:21:00.000 | 0 | 0 | 0 | 0 | python,kivy | 30,334,720 | 1 | false | 0 | 1 | You could Clock.schedule(some_function, 0) in your build method, I think that would run after everything is initialised but before the next frame. | 1 | 2 | 0 | How can I register a callback for when a Kivy gui is loaded?
In my Kivy app, as soon as the GUI is loaded (aka the window pops up with the initial view), I need to kick off a function that loads expensive data and updates the UI.
So far i've been using the on_start method in App but this runs before the GUI is loaded.... | kivy -- event for when guis is loaded | 0 | 0 | 0 | 499 |
30,335,122 | 2015-05-19T20:04:00.000 | 18 | 0 | 1 | 1 | python,windows,python-3.x,windows-10 | 31,065,211 | 2 | false | 0 | 0 | You can use python -m pip install package | 1 | 7 | 0 | I installed the latest version of Python from www.python.org. Python 3.4.3. I then go to run pip and I get
"Fatal error in launcher: Job information querying failed"
Searching for this error message points me to similar issues running Python under wine. If you grab a pre-compiled pip.exe it will work but it seems ... | Pip.exe from Python on Windows 10 | 1 | 0 | 0 | 18,024 |
30,340,898 | 2015-05-20T05:23:00.000 | 1 | 0 | 1 | 0 | python,object,base-class | 30,341,253 | 2 | false | 0 | 0 | From the docs, chapter 3 (Data Model): "All data in a Python program is represented by objects." Seems clear enough. You say the alternative "might be interesting" but there are already lots of interesting things that aren't Python. | 1 | 5 | 0 | As everyone knows, everything is an object in Python. What I'm wondering about is whether it's possible to create an "object" x such that isinstance(x, object) returns False. I suspect it's possible with sufficient abuse of the CPython API, though achieving this with pure Python would be even more interesting.
Initiall... | Can a non-object exist in Python? | 0.099668 | 0 | 0 | 1,259 |
30,345,197 | 2015-05-20T09:10:00.000 | 1 | 1 | 0 | 0 | python,c++,eclipse | 30,345,675 | 1 | true | 0 | 0 | Basically you could add C++ nature to the project. Eclipse project could have several natures simultaneously, so you will have both python and C++ goodies.
Right-click on the project.
Select: New -> Other
Under C/C++, select "Convert to a C/C++ project" | 1 | 0 | 0 | I'm working on a large codebase in an Eclipse project. Our codebase has both Python and C++ code. Since I only worked in Python until now, I created the project as a Python project.
Now I'm about to work heavily with some of our C++ modules, and I would like the benefits of CTD. My Eclipse has CTD (the Eclipse C++ plu... | Converting a Python project to C++ | 1.2 | 0 | 0 | 473 |
30,347,571 | 2015-05-20T10:54:00.000 | 0 | 0 | 0 | 0 | python,bash,web-scraping | 30,433,834 | 1 | true | 1 | 0 | I solved the issue which keeps searches in GoogleScraper database,we first have to run following command
GoogleScraper --clean
This command cleans all cache and we can search again with new results.
Regards! | 1 | 0 | 0 | I am using GoogleScraper for some automated searches in python.
GoogleScraper keeps search results for search queries in its database named google_scraper.db.e.g. if i have searched site:*.us engineering books and due to internet issue while making json file by GoogleScraper.If the result is missed and json file is not... | GoogleScraper keeps searches in database | 1.2 | 1 | 1 | 192 |
30,350,382 | 2015-05-20T12:58:00.000 | 1 | 1 | 1 | 0 | python,python-2.7 | 30,350,613 | 1 | false | 0 | 0 | Python gets different amounts of system resources depending upon what else the CPU is doing at the time. If you're playing Skyrim with the highest graphics levels at the time, then your script will run slower than if no other programs were open. But even if your task bar is empty, there may be invisible background proc... | 1 | 0 | 0 | I am working on a Opencv based Python project. I am working on program development which takes less time to execute. For that i have tested my small program print hello world on python to test the time taken to run the program. I had run many time and every time it run it gives me a different run time.
Can you explain ... | Different time taken by python script every time it is runned? | 0.197375 | 0 | 0 | 38 |
30,352,504 | 2015-05-20T14:23:00.000 | 1 | 1 | 1 | 0 | python,pylint | 30,378,706 | 1 | false | 0 | 0 | You can use the ignore option in the configuration file or add # pylint: disable=all on the top of the python file. | 1 | 1 | 0 | Salutations, all.
I'm working on a python project and have been tasked with cleaning the pylint warnings. Things is, there are specific parts of the code that require indentation or spacing between words that go against Pylint.
Question: is there a way to disable specific pyling warnings on specific files from the rcfi... | On PyLint, disable specific warning on specif files using rcfile | 0.197375 | 0 | 0 | 422 |
30,353,541 | 2015-05-20T15:04:00.000 | 1 | 0 | 0 | 0 | python,packages,kivy | 30,354,153 | 1 | true | 0 | 1 | Yes you can. Just download the package you want to use and place it in the same folder as your main.py. Then import whatever you wish to use from that package. The packages will also work when you deploy the app onto an Android device. | 1 | 1 | 0 | Is it possible to use any Python package within a Kivy program, and ultimately running it on an android device? for example - can I use the package "xlrd" or "googlemaps" on Kivy? If the answer is positive, How do I do it? normally I get an error message that says "No module named X".
Thank you. | Using various Python packages within a Kivy program | 1.2 | 0 | 0 | 199 |
30,354,621 | 2015-05-20T15:52:00.000 | 0 | 1 | 0 | 1 | python,windows,monitoring | 30,358,001 | 2 | true | 0 | 0 | If there are no other mitigating factors in your design or requirements, my suggestion would be to simplify the script so that it doesn't do the polling; it simply sends the file when invoked, and use Windows Scheduler to invoke the script on whatever schedule you need. By relying on a core Windows service, you can fac... | 1 | 0 | 0 | I have a simple python script to send data from a Windows 7 box to a remote computer via SFTP. The script is set to continuously send a single file every 5 minutes. This all works fine but I'm worried about the off chance that the process stops or fails and the customer doesn't notice the data files have stopped coming... | How can I monitor a python scrypt and restart it in the event of a crash? (Windows) | 1.2 | 0 | 0 | 403 |
30,357,663 | 2015-05-20T18:28:00.000 | 3 | 0 | 1 | 1 | python,http,tornado,web-frameworks | 30,362,810 | 1 | true | 0 | 0 | The vast majority of Tornado apps should have only one IOLoop, running in the main thread. You can run multiple HTTPServers (or other servers) on the same IOLoop.
It is possible to create multiple IOLoops and give each one its own thread, but this is rarely useful, because the GIL ensures that only one thread is runnin... | 1 | 5 | 0 | i have been working on tornado web framework from sometime, but still i didnt understood the ioloop functionality clearly, especially how to use it in multithreading.
Is it possible to create separate instance of ioloop for multiple server ?? | Tornado ioloop + threading | 1.2 | 0 | 0 | 4,428 |
30,360,110 | 2015-05-20T20:49:00.000 | 0 | 0 | 1 | 0 | python,python-module | 30,360,215 | 3 | false | 0 | 0 | You can import the same module in separate files (custom modules) as far as I know. Python keeps track of already imported modules and knows how to resolve a second import. | 1 | 0 | 0 | Is there a downside to importing the same built-in module in both my script and custom module?
I have a script that: imports my custom module and imports the built-in csv module to open a csv file and append any necessary content to a list.
I then have a method in my custom module in which i pass a path, filename and l... | Can I import a built-in module twice in both my script and custom module | 0 | 0 | 0 | 328 |
30,361,438 | 2015-05-20T22:26:00.000 | 4 | 0 | 1 | 0 | python,function,input,arguments,terminology | 30,361,573 | 4 | false | 0 | 0 | The inputs to a function are not only the arguments. The function arguments are just one form of input that a function can take. Some functions take other types of inputs. So an input is more general than an argument.
A function can take input from a file or network socket or from a global or module variable.
A class o... | 4 | 2 | 0 | Is there a difference in the Python nomeclature wherein a function taking input is different than a function taking an argument?
Isn't the input (i.e. the data you would have a function "process") the same as when you pass an argument to a function?
The reason I'm asking is Codeacademy has a tutorial that asks the st... | Python function taking argument vs input | 0.197375 | 0 | 0 | 1,451 |
30,361,438 | 2015-05-20T22:26:00.000 | 1 | 0 | 1 | 0 | python,function,input,arguments,terminology | 30,361,505 | 4 | false | 0 | 0 | I guess you are confusing the expressions.
The input(s) of a function is (are) the value(s) you pass as argument(s). | 4 | 2 | 0 | Is there a difference in the Python nomeclature wherein a function taking input is different than a function taking an argument?
Isn't the input (i.e. the data you would have a function "process") the same as when you pass an argument to a function?
The reason I'm asking is Codeacademy has a tutorial that asks the st... | Python function taking argument vs input | 0.049958 | 0 | 0 | 1,451 |
30,361,438 | 2015-05-20T22:26:00.000 | 1 | 0 | 1 | 0 | python,function,input,arguments,terminology | 30,361,494 | 4 | false | 0 | 0 | It's the same term: The actual input of a function is the argument(s) passed when calling it.
Edit: As I learned, there are more than one answer to the question what input may mean to a function. However, in the case of this basic tutorial the simple answer is appropriate. | 4 | 2 | 0 | Is there a difference in the Python nomeclature wherein a function taking input is different than a function taking an argument?
Isn't the input (i.e. the data you would have a function "process") the same as when you pass an argument to a function?
The reason I'm asking is Codeacademy has a tutorial that asks the st... | Python function taking argument vs input | 0.049958 | 0 | 0 | 1,451 |
30,361,438 | 2015-05-20T22:26:00.000 | 3 | 0 | 1 | 0 | python,function,input,arguments,terminology | 30,361,617 | 4 | false | 0 | 0 | I think the term input is too ambiguous to equate to argument. Object methods could use object members as input, but these would not be passed in as arguments. Also, arguments can be outputs (e.g. an array which is filled by the method). | 4 | 2 | 0 | Is there a difference in the Python nomeclature wherein a function taking input is different than a function taking an argument?
Isn't the input (i.e. the data you would have a function "process") the same as when you pass an argument to a function?
The reason I'm asking is Codeacademy has a tutorial that asks the st... | Python function taking argument vs input | 0.148885 | 0 | 0 | 1,451 |
30,362,475 | 2015-05-21T00:16:00.000 | 0 | 0 | 1 | 0 | python,visual-studio-2013,pygame | 30,362,867 | 1 | false | 0 | 0 | I've tried using Eclipse with Pygame. It doesn't recognize it.
Visual-Studio2013 just probably thinks something is wrong.
The code should still run fine. | 1 | 1 | 0 | I was using Visual Studio 2013 to edit some python code, and Intellisense is giving me a green squiggly line when I import pygame. How can I fix this? | Intellisense Not Recognizing Python Module(Pygame) | 0 | 0 | 0 | 283 |
30,362,600 | 2015-05-21T00:29:00.000 | 0 | 0 | 1 | 1 | python-3.x,pip,python-requests | 53,805,505 | 6 | false | 0 | 0 | i just reinstalled the pip and it works, but I still wanna know why it happened...
i used the apt-get remove --purge python-pip after I just apt-get install pyhton-pip and it works, but don't ask me why... | 2 | 51 | 0 | I have both Python 2.7 and 3.4 installed on my Ubuntu 14.04 machine. I want to install the 'requests' module so it is accessible from Py3.4.
When I issued pip install requests on my terminal cmd line I got back:
"Requirement already satisfied (use --upgrade to upgrade): requests in /usr/lib/python2.7/dist-packages"
... | How to install requests module in Python 3.4, instead of 2.7 | 0 | 0 | 1 | 316,112 |
30,362,600 | 2015-05-21T00:29:00.000 | 0 | 0 | 1 | 1 | python-3.x,pip,python-requests | 53,132,450 | 6 | false | 0 | 0 | i was facing same issue in beautiful soup , I solved this issue by this command , your issue will also get rectified .
You are unable to install requests in python 3.4 because your python libraries are not updated .
use this command
apt-get install python3-requests
Just run it will ask you to add 222 MB space in you... | 2 | 51 | 0 | I have both Python 2.7 and 3.4 installed on my Ubuntu 14.04 machine. I want to install the 'requests' module so it is accessible from Py3.4.
When I issued pip install requests on my terminal cmd line I got back:
"Requirement already satisfied (use --upgrade to upgrade): requests in /usr/lib/python2.7/dist-packages"
... | How to install requests module in Python 3.4, instead of 2.7 | 0 | 0 | 1 | 316,112 |
30,363,813 | 2015-05-21T03:00:00.000 | 0 | 0 | 1 | 0 | python,python-2.7,python-3.x,pip,anaconda | 42,434,840 | 4 | false | 0 | 0 | (in command prompt)C:\Python34\scripts\pip.exe install pytz
this assumes your path is similar to mine. I used the default install location for all my pythons(2.7,3.4). | 1 | 11 | 0 | I have the following Python distributions installed on my Windows computer:
Python 2.7 (IDLE)
Python 3.4 (IDLE)
Anaconda (Python 3.4)
Obviously, they all store their libraries in different locations.
So, how can I easily make a targeted installation to (a different) one of them each time I need to do so?
For example... | How can I control which Python distribution to pip install a package to when I have Python 2, Python 3, and Anaconda on my computer? | 0 | 0 | 0 | 16,412 |
30,364,325 | 2015-05-21T03:58:00.000 | 0 | 1 | 1 | 0 | python,file,dependencies | 30,380,080 | 1 | false | 0 | 0 | Put the data file in a place relative to the module. Use inspect module to figure out the path of the module and then read the data file using this information. | 1 | 0 | 0 | I have a module in site-packages that uses collection of binary files. Besides hard-coding the absolute paths of these files in the module, is there a better way to handle this module-datafile dependency? | Best way to handle files used by python module | 0 | 0 | 0 | 24 |
30,364,981 | 2015-05-21T05:04:00.000 | 1 | 0 | 1 | 1 | python,subprocess | 30,365,032 | 1 | true | 0 | 0 | You are doing this backwards, and shouldn't be using the child process to kill the parent process.
Instead, you will want a parent process of your "perpetually running" script (which will now be the subprocess). When an update is detected, the subprocess kills itself, and requests that the parent implement your changes... | 1 | 0 | 0 | Im working on two scripts.
One script is perpetually running.
When it senses an update to itself, it will run the second script as a subprocess.
The second script should kill the first script, implement the changes and run the updated script.
However, I cant find a way to kill the first script. How does the child pr... | Python kill parent script (subprocess) | 1.2 | 0 | 0 | 650 |
30,365,807 | 2015-05-21T06:10:00.000 | 1 | 0 | 1 | 1 | python,objective-c,ipc | 30,365,943 | 1 | false | 0 | 0 | I would argue it's not the HTTP that adds a lot of overhead, but the TCP 3-way connection handshake.
Having said that, a lot of systems use TCP for inter-process communication, so if you want to use HTTP, it's only a very small extra load on top.
Of course with HTTP, you are creating a new connection with each request,... | 1 | 0 | 0 | I'm designing a system like this: a Python process (let's call it "server") accepts inputs from another process ("client", written in Objective-C) on the same machine and returns outputs to the client.
What's a good architecture for this system? I mean, what's a good protocol for server/client communication? I think ma... | Long-running Python process that accepts inputs from another non-Python process | 0.197375 | 0 | 0 | 25 |
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