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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
13,487,181 | 2012-11-21T05:51:00.000 | 0 | 0 | 1 | 0 | python,sockets,shared-memory | 13,513,533 | 2 | false | 0 | 0 | mmap doesn't take a file name but rather a file descriptor. It performs the so-called memory mapping, i.e. it associates pages in the virtual memory space of the process with portions of the file-like object, represented by the file descriptor. This is a very powerful operation since it allows you:
to access the conte... | 2 | 2 | 0 | I have a processes from several servers that send data to my local port 2222 via udp every second.
I want to read this data and write it to shared memory so there can be other processes to read the data from shared memory and do things to it.
I've been reading about mmap and it seems I have to use a file... which I can... | how to write to shared memory in python from stream? | 0 | 0 | 0 | 2,659 |
13,488,266 | 2012-11-21T07:25:00.000 | 2 | 0 | 0 | 0 | python,forms,httpwebrequest,scrapy | 13,490,825 | 2 | false | 1 | 0 | if you are using FormRequest.from_response() then all hidden values are already pre-populated automatically.
but in most of the cases you need to override them as well depends on website functionality and behavior. | 2 | 0 | 0 | I want to know that if i need to perform some search on the job site , then do i need to pass only those variables which are visible on the form or all the variables , even some hidden fields like
The form is here http://www.example.com/search.php
Now there are two fields on the form like searchTerm and area and th... | Do i need to pass all the hidden fields as well with the form in scrapy | 0.197375 | 0 | 0 | 341 |
13,488,266 | 2012-11-21T07:25:00.000 | 1 | 0 | 0 | 0 | python,forms,httpwebrequest,scrapy | 13,492,597 | 2 | false | 1 | 0 | Sometimes you can go without some of the hidden fields, other times - not.
You cannot know the server logic. It's up to the website how it is handling each of the form fields. | 2 | 0 | 0 | I want to know that if i need to perform some search on the job site , then do i need to pass only those variables which are visible on the form or all the variables , even some hidden fields like
The form is here http://www.example.com/search.php
Now there are two fields on the form like searchTerm and area and th... | Do i need to pass all the hidden fields as well with the form in scrapy | 0.099668 | 0 | 0 | 341 |
13,491,731 | 2012-11-21T10:55:00.000 | 2 | 0 | 0 | 0 | python,numpy | 13,491,927 | 1 | true | 0 | 0 | Have you looked at the way floats are represented in text before and after? You might have a line "1.,2.,3." become "1.000000e+0, 2.000000e+0,3.000000e+0" or something like that, the two are both valid and both represent the same numbers.
More likely, however, is that if the original file contained floats as values wi... | 1 | 0 | 1 | I'm extracting a large CSV file (200Mb) that was generated using R with Python (I'm the one using python).
I do some tinkling with the file (normalization, scaling, removing junk columns, etc) and then save it again using numpy's savetxt with data delimiter as ',' to kee the csv property.
Thing is, the new file is almo... | Numpy save file is larger than the original | 1.2 | 0 | 0 | 280 |
13,495,135 | 2012-11-21T14:12:00.000 | 1 | 0 | 0 | 0 | python,django,postgresql | 13,495,557 | 1 | true | 1 | 0 | Er, not sure how we can help you with that. One is for bash, one is for SQL.
No, that's for running the development webserver, as the tutorial explains.
There's no need to do that, that's what the virtualenv is for.
This has nothing to do with Python versions, you simply don't seem to be in the right directory. Note t... | 1 | 1 | 0 | I'm new to web development and I'm trying to get my mac set up for doing Django tutorials and helping some developers with a project that uses postgres. I will try to specify my questions as much as possible. However, it seems that there are lots of floating parts to this question and I'm not quite understanding some p... | postgres installation error on Mac 10.6.8 | 1.2 | 1 | 0 | 291 |
13,495,606 | 2012-11-21T14:39:00.000 | 0 | 0 | 0 | 0 | python,http,session-state | 13,495,800 | 1 | false | 0 | 0 | If this is through a browser and is using cookies then this shouldn't be an issue at all. The cookie will, from what I can tell, the last session value that it is set to. If the client you are using does not use cookies then of course it will open a new session for each connection. | 1 | 1 | 0 | I have a problem and can't solve it. Maybe I'm making it too hard or complex or I'm just going in the wrong direction and thinking of things that don't make sense. Below is a description of what happens. (Multiple tabs opened in a browser or a page that requests some other pages at the same time for example.)
I have a ... | What are good ways to create a HTTP session with simultaneous requests? | 0 | 0 | 1 | 484 |
13,496,868 | 2012-11-21T15:47:00.000 | 2 | 0 | 1 | 0 | python | 13,496,967 | 4 | false | 0 | 0 | I have no experience of Python, but a simple Google search comes up with py2exe
As for OS independent, that's impossible, that's the whole point of an interpreter. The code is write once run anywhere, but once you compile it, you have to compile it for a specific platform | 2 | 1 | 0 | Suppose i have a main.py for a calculator application. I used different .py files for different function like(add.py for adding, mul.py for multiplication) and all these files are imported in main.py. When I click main.py it executes successfully and do all function like adding, mul, etc. What i want to do is to make a... | Converting .py extension to executable file | 0.099668 | 0 | 0 | 1,412 |
13,496,868 | 2012-11-21T15:47:00.000 | 1 | 0 | 1 | 0 | python | 13,497,152 | 4 | true | 0 | 0 | It is impossible to have an independent executable that runs on any OS, that's why Python is an interpreted language. What you can do is compile the Python scripts into an executable on each OS you want it to run on, using pyinstaller, so you are have a bunch of different independent programs for different OSs all buil... | 2 | 1 | 0 | Suppose i have a main.py for a calculator application. I used different .py files for different function like(add.py for adding, mul.py for multiplication) and all these files are imported in main.py. When I click main.py it executes successfully and do all function like adding, mul, etc. What i want to do is to make a... | Converting .py extension to executable file | 1.2 | 0 | 0 | 1,412 |
13,497,607 | 2012-11-21T16:25:00.000 | 1 | 1 | 1 | 0 | python,search | 35,276,856 | 4 | false | 0 | 0 | The only reason anyone would want a tool that is capable of searching 'certain parts' of a file is because what they are trying to do is analyze data that has legal restrictions on which parts of it you can read.
For example, Apple has the capability of identifying the GPS location of your iPhone at any moment a text ... | 1 | 1 | 0 | I'm making a search tool in Python.
Its objective is to be able to search files by their content. (we're mostly talking about source file, text files, not images/binary - even if searching in their METADATA would be a great improvment). For now I don't use regular expression, casual plain text.
This part of the algorit... | Create an index of the content of each file in a folder | 0.049958 | 0 | 0 | 3,002 |
13,498,828 | 2012-11-21T17:31:00.000 | 2 | 0 | 0 | 0 | python,node.js,heroku,cedar | 13,785,484 | 1 | true | 1 | 0 | After having played around a little, and also doing some reading, it seems like Heroku apps that need this have 2 main options:
1) Use some kind of back-end, that both apps can talk to. Examples would be a DB, Redis, 0mq, etc.
2) Use what I suggested above. I actually went ahead and implemented it, and it works.
Just t... | 1 | 3 | 0 | I am trying to build a web-app that has both a Python part and a Node.js part. The Python part is a RESTful API server, and the Node.js will use sockets.io and act as a push server. Both will need to access the same DB instance (Heroku Postgres in my case). The Python part will need to talk to the Node.js part in order... | Heroku Node.js + Python | 1.2 | 0 | 1 | 2,109 |
13,503,553 | 2012-11-21T23:10:00.000 | 0 | 0 | 1 | 0 | types,input,python-3.x,eval | 13,521,828 | 3 | false | 0 | 0 | To answer your second part of the question you can use the isinstance() function in python to check if a variable is of a certain type. | 1 | 1 | 0 | I have some functions calling for user input, sometimes string, int or whatever. so i noticed that if ENTER is pressed with NO INPUT i get an error. SO i did some research and i think i found that EVAL function may be what I'm looking for, but then again i read about its dangers.
SO here are my questions:
How can i ch... | "Force" User Input and Checking for correct Input Type | 0 | 0 | 0 | 1,011 |
13,505,194 | 2012-11-22T02:45:00.000 | 2 | 0 | 0 | 0 | python,http,scrapy,web-crawler | 13,585,472 | 1 | false | 1 | 0 | Are you sure you are allowed to crawl the destination site at high speed? Many sites implement download threshold and "after a while" start responding slowly. | 1 | 8 | 0 | I am experiencing slow crawl speeds with scrapy (around 1 page / sec).
I'm crawling a major website from aws servers so I don't think its a network issue. Cpu utilization is nowhere near 100 and if I start multiple scrapy processes crawl speed is much faster.
Scrapy seems to crawl a bunch of pages, then hangs for sever... | Scrapy Crawling Speed is Slow (60 pages / min) | 0.379949 | 0 | 1 | 4,117 |
13,505,819 | 2012-11-22T04:16:00.000 | 1 | 0 | 1 | 0 | python,recursion,path,split,tuples | 13,505,834 | 2 | false | 0 | 0 | Your error is not in recursion, but rather what you're doing to concatenate the recursive results. Say you have reached ('E:', 'John', '2012', 'prac'), and the next character is 't'; you don't want to append 't' to the recursive result, you want to append it to the last word of the recursive result. Similarly, when you... | 1 | 7 | 0 | I am trying to split a path given as a string into sub-parts using the "/" as a delimiter recursively and passed into a tuple. For ex: "E:/John/2012/practice/question11" should be ('E:', 'John', '2012', 'practice', 'question11').
So I've passed every character excluding the "/" into a tuple but it is not how I wanted t... | Python Split path recursively | 0.099668 | 0 | 0 | 3,076 |
13,507,434 | 2012-11-22T07:07:00.000 | 2 | 0 | 0 | 0 | python,scrapy | 13,507,452 | 3 | false | 1 | 0 | The u symbol is added in displaying the strings to represent that the object is a Unicode string. Similarly, if you use a unicode string in your code, you can use a unicode literal by adding a u symbol next to the string itself. | 1 | 0 | 0 | I am using scrapy to scrap the website. My items are appearing like this
{'company': [u'Resource Agility'],
i am sick of this u.
is that normal?
i want to know that if i store my value in database, does the u also get in there?
Is there any way to hide that u? | Why i see `u` in front of all the text in python text | 0.132549 | 0 | 0 | 170 |
13,508,043 | 2012-11-22T07:51:00.000 | 3 | 0 | 0 | 0 | python,python-2.7,tkinter,tkmessagebox | 13,508,222 | 1 | true | 0 | 1 | Short answer: "No!" message is a simple string, no interpretation like in some widgets of other frameworks is done.
Longer answer: You could e.g. subclass+monkeypatch, to provide such feature. | 1 | 6 | 0 | I got a tkMEssagebox.showerror showing up in a python tkinter application,
when somebody failed to login with the application.
Is it possible to have a url link in the tkMessageBox.showerror?
ie.
tkMessageBox.showerror("Error","An error occured please visit
www.blahblubbbb.com")
and I want the www.blahblubbbb.com t... | tkinter tkMessageBox html link | 1.2 | 0 | 0 | 2,245 |
13,510,284 | 2012-11-22T10:09:00.000 | 3 | 0 | 1 | 0 | python | 13,510,303 | 3 | false | 0 | 0 | No, there normally is no harm such a condition could cause.
The in comparison operator doesn't alter anything. If any of the variables a, b, c or d is indeed 0 or False, then the test would succeed, otherwise it would fail (return False). The four variables collected (temporarily) into a list would not be affected them... | 1 | 4 | 0 | Is there any active harm in using if False in [a, b, c, d]?
It reduces the size of the code and it works in the interpreter. But is there any active harm such a condition can cause? | Any active harm in `if False in [a, b, c, d]` | 0.197375 | 0 | 0 | 149 |
13,513,103 | 2012-11-22T12:49:00.000 | -1 | 0 | 1 | 0 | python,testing,load-testing,performance-testing | 13,513,162 | 4 | true | 0 | 0 | 10,000 per second? You'll need lots of machines to do this.
Write a client that can POST requests serially and then replicate it on several machines. | 2 | 3 | 0 | I developed REST server. I hosted that one my virtual machine nginx server. Now i want to do bench marking by sending 10,000 concurrent request per second. So any solution for this ? | How to send concurrent 10,000 post request using python? | 1.2 | 0 | 1 | 2,276 |
13,513,103 | 2012-11-22T12:49:00.000 | 0 | 0 | 1 | 0 | python,testing,load-testing,performance-testing | 13,514,261 | 4 | false | 0 | 0 | programmatically you can create threads and do a url fetch by every thread but not sure if you can create 10,000 requests. | 2 | 3 | 0 | I developed REST server. I hosted that one my virtual machine nginx server. Now i want to do bench marking by sending 10,000 concurrent request per second. So any solution for this ? | How to send concurrent 10,000 post request using python? | 0 | 0 | 1 | 2,276 |
13,514,119 | 2012-11-22T13:49:00.000 | 4 | 0 | 1 | 0 | python,virtualenv | 13,514,167 | 1 | true | 0 | 0 | As long as the module you wish to edit is written in pure Python, changing the source code in the virtualenv's site-packages directory should work just fine. If the module is a C-extension, then you will need to recompile the module before the changes take effect.
Edit: Note that if you are working with the module in ... | 1 | 5 | 0 | I have a module installed using pip in a virtualenv. I want to experiment with a single change on one line of its code, and wonder if it will work by going straight to the source file and changing that line?
If not, what is the easiest way to do so? Download the source, change it, and run python setup.py install inside... | Change installed Python module in virtualenv | 1.2 | 0 | 0 | 1,880 |
13,514,509 | 2012-11-22T14:11:00.000 | 5 | 0 | 0 | 0 | python,sqlite,search | 65,373,519 | 4 | false | 0 | 0 | Just dump the db and search it.
% sqlite3 file_name .dump | grep 'my_search_string'
You could instead pipe through less, and then use / to search:
% sqlite3 file_name .dump | less | 2 | 13 | 0 | Is there a library or open source utility available to search all the tables and columns of an Sqlite database? The only input would be the name of the sqlite DB file.
I am trying to write a forensics tool and want to search sqlite files for a specific string. | Search Sqlite Database - All Tables and Columns | 0.244919 | 1 | 0 | 15,981 |
13,514,509 | 2012-11-22T14:11:00.000 | 4 | 0 | 0 | 0 | python,sqlite,search | 59,407,127 | 4 | false | 0 | 0 | @MrWorf's answer didn't work for my sqlite file (an .exb file from Evernote) but this similar method worked:
Open the file with DB Browser for SQLite sqlitebrowser mynotes.exb
File / Export to SQL file (will create mynotes.exb.sql)
grep 'STRING I WANT" mynotes.exb.sql | 2 | 13 | 0 | Is there a library or open source utility available to search all the tables and columns of an Sqlite database? The only input would be the name of the sqlite DB file.
I am trying to write a forensics tool and want to search sqlite files for a specific string. | Search Sqlite Database - All Tables and Columns | 0.197375 | 1 | 0 | 15,981 |
13,514,805 | 2012-11-22T14:29:00.000 | 3 | 0 | 0 | 0 | python,networking,pipe | 13,519,364 | 2 | false | 0 | 0 | 'Broken pipe' means you have written to a connection that has already been closed by the other end. So, you must have done that somehow. | 1 | 1 | 0 | I'm writing a peer-to-peer program that requires the network be fully connected. However, when I test this locally and bring up about 20 nodes, some nodes successfully create a socket to other nodes, but when writing immediately after a broken pipe error occurs. This only happens when I start all nodes one right after ... | Reason for broken pipes | 0.291313 | 0 | 1 | 2,008 |
13,515,048 | 2012-11-22T14:41:00.000 | 1 | 0 | 1 | 0 | python,debugging,io,refactoring | 13,516,870 | 5 | false | 0 | 0 | In harsh circumstances (output done in some weird binary libraries) you could also use strace -e write (and more options). If you do not read strace's output, the straced program waits until you do, so you can send it a signal and see where it dies. | 1 | 4 | 0 | I have a program depending on a large code base that prints a lot of irrelevant and annoying messages. I would like to clean them up a bit, but since their content is dynamically generated, I can't just grep for them.
Is there a way to place a hook on the print statement? (I use python 2.4, but I would be interested in... | How do you find where a print statement is located? | 0.039979 | 0 | 0 | 724 |
13,515,813 | 2012-11-22T15:26:00.000 | 0 | 1 | 1 | 0 | java,python,math | 13,515,894 | 5 | false | 0 | 0 | What kind of math operations do you need?
Java already provides classes like java.math.BigDecimal or java.math.BigInteger you can use to do basic stuff (addition, multiplication, etc.) | 1 | 4 | 0 | I am looking for some way to handle numbers that are in the tens of millions of digits and can do math at this level. I can use Java and a bit of Python. So a library for one of these would be handy, but a program that can handle these kind of numbers would also work. Does anyone have any suggestions?
Thanks | Program or library to handle massive numbers | 0 | 0 | 0 | 207 |
13,517,991 | 2012-11-22T18:02:00.000 | 3 | 0 | 1 | 0 | python-3.x,urllib3 | 13,520,455 | 1 | true | 0 | 0 | You need to install it for each version of Python you have - if pip installs it for Python 2.7, it won't be accessible from 3.2.
There doesn't seem to be a pip-3.2 script, but you can try easy_install3 urllib3. | 1 | 1 | 0 | I have Python 2.7.3 installed alongside Python 3.2.3 on an Ubuntu system.
I've installed urllib3 using pip and can import it from the python shell. When I open the python3 shell, I get a can't find module error when trying to import urllib3. help('modules') from within the shell also doesn't list urllib3.
Any ideas on ... | Python3 can't find urllib3 | 1.2 | 0 | 1 | 4,054 |
13,518,222 | 2012-11-22T18:21:00.000 | 0 | 0 | 0 | 0 | python,django,django-models,naming-conventions | 13,518,421 | 2 | false | 1 | 0 | Depending on the structure of other parts of your code, you could use the name of the Django app, a package, or a module to further scope the names. | 2 | 2 | 0 | I have a pretty stupid question about model naming conventions in Django.
Imagine a farmstead which has buildings which have rooms.
Farmstead --> Buildings --> Rooms
With Farmstead it is ok, let's call it a Farmstead. Next one: Building or FarmsteadBuilding? BuildingRoom, Room or FarmsteadBuildingRoom? | Django model naming conventions | 0 | 0 | 0 | 931 |
13,518,222 | 2012-11-22T18:21:00.000 | 6 | 0 | 0 | 0 | python,django,django-models,naming-conventions | 13,518,370 | 2 | true | 1 | 0 | If all your instances of Room belongs to a Building (and there is no another kind of models like Apartment) and all your instances of Building belongs to a Farmstead (following the same idea), so just use the name of your models like Farmstead, Building and Room. It's not necessary to specify something that is already ... | 2 | 2 | 0 | I have a pretty stupid question about model naming conventions in Django.
Imagine a farmstead which has buildings which have rooms.
Farmstead --> Buildings --> Rooms
With Farmstead it is ok, let's call it a Farmstead. Next one: Building or FarmsteadBuilding? BuildingRoom, Room or FarmsteadBuildingRoom? | Django model naming conventions | 1.2 | 0 | 0 | 931 |
13,519,086 | 2012-11-22T19:38:00.000 | 1 | 0 | 0 | 0 | python,gstreamer,python-gstreamer | 13,529,688 | 3 | false | 1 | 0 | What does "you'll need to thread your own gst object" mean? And what does "wait until the query succeeds" mean?
State changes from NULL to PAUSED or PLAYING state are asynchronous. You will usually only be able to do a successful duration query once the pipeline is prerolled (so state >= PAUSED). When you get an ASYNC_... | 3 | 0 | 0 | I'm developing a media player that streams mp3 files. I'm using the python gstreamer module to play the streams.
my player is the playbin2 element
When I want to query the position (with query_position(gst.FORMAT_TIME,None)), it always returns a gst.QueryError: Query failed.
The song is definetly playing. (state is not... | element playbin2 query_position always returns query failed | 0.066568 | 0 | 1 | 700 |
13,519,086 | 2012-11-22T19:38:00.000 | 0 | 0 | 0 | 0 | python,gstreamer,python-gstreamer | 13,529,066 | 3 | false | 1 | 0 | I found it on my own. Problem was with threading. Apparently, you'll need to thread your gst object and just wait until the query succeeds. | 3 | 0 | 0 | I'm developing a media player that streams mp3 files. I'm using the python gstreamer module to play the streams.
my player is the playbin2 element
When I want to query the position (with query_position(gst.FORMAT_TIME,None)), it always returns a gst.QueryError: Query failed.
The song is definetly playing. (state is not... | element playbin2 query_position always returns query failed | 0 | 0 | 1 | 700 |
13,519,086 | 2012-11-22T19:38:00.000 | 0 | 0 | 0 | 0 | python,gstreamer,python-gstreamer | 13,525,709 | 3 | false | 1 | 0 | From what source are you streaming? If you query the position from the playbin2 I'd say you do everything right. Can you file a bug for gstreamer, include a minimal python snippet that exposes the problem and tell from which source you stream - ideally its public. | 3 | 0 | 0 | I'm developing a media player that streams mp3 files. I'm using the python gstreamer module to play the streams.
my player is the playbin2 element
When I want to query the position (with query_position(gst.FORMAT_TIME,None)), it always returns a gst.QueryError: Query failed.
The song is definetly playing. (state is not... | element playbin2 query_position always returns query failed | 0 | 0 | 1 | 700 |
13,520,279 | 2012-11-22T21:34:00.000 | 0 | 1 | 0 | 0 | python,unit-testing | 13,520,332 | 3 | false | 0 | 0 | You haven't explained what the calculations are, but I guess your program should be able to work with a subset of the big file, as well. If this is the case, make a unit test which opens up a small file , does the calculations and produces some result, which you can verify is correct. | 2 | 7 | 0 | I've written a script that opens up a file, reads the content and does some operations and calculations and stores them in sets and dictionaries.
How would I write a unit test for such a thing? My questions specifically are:
Would I test that the file opened?
The file is huge (it's the unix dictionary file). How would... | Unit testing a script that opens a file | 0 | 0 | 0 | 3,162 |
13,520,279 | 2012-11-22T21:34:00.000 | 6 | 1 | 0 | 0 | python,unit-testing | 14,733,487 | 3 | false | 0 | 0 | You should refactor your code to be unit-testable. That, on the top of my head, would say:
Take the functionality of the file opening into a separate unit. Make that new unit receive the file name, and return the stream of the contents.
Make your unit receive a stream and read it, instead of opening a file and readin... | 2 | 7 | 0 | I've written a script that opens up a file, reads the content and does some operations and calculations and stores them in sets and dictionaries.
How would I write a unit test for such a thing? My questions specifically are:
Would I test that the file opened?
The file is huge (it's the unix dictionary file). How would... | Unit testing a script that opens a file | 1 | 0 | 0 | 3,162 |
13,520,319 | 2012-11-22T21:37:00.000 | 1 | 0 | 0 | 0 | python,r,time-series | 13,520,565 | 1 | false | 0 | 0 | Calculate the derivation of your sample points, for example for every 5 points (THRESHOLD!) calculate the slope of the five points with Least squares methods (search on wiki if you dont know what it is. Any lineair regression function uses it). And when this slope is almost (THRESHOLD!) zero there is a peak. | 1 | 3 | 1 | In time series we can find peak (min and max values). There are algorithms to find peaks. My question is:
In python are there libraries for peak detection in time series data?
or
something in R using RPy? | Peak detection in Python | 0.197375 | 0 | 0 | 1,640 |
13,521,142 | 2012-11-22T23:08:00.000 | 0 | 0 | 1 | 0 | python,nltk,context-free-grammar,part-of-speech | 13,554,998 | 2 | true | 0 | 0 | Couldnt find one. Had to implement my own parser using stacks. Honestly wasnt too much of a pain. | 1 | 2 | 0 | I have a text corpus that contains sentences represented as trees with their Part of Speech tags. I want to build a system that can probably learn a probabilistic grammar from this tree structure. Are there any inbuilt python modules than can tackle this or do I have to have to build a parser? | Building a grammar from trees in python | 1.2 | 0 | 0 | 745 |
13,522,556 | 2012-11-23T02:53:00.000 | 7 | 0 | 1 | 1 | python,subprocess,pipe,wait,communicate | 13,849,245 | 1 | true | 0 | 0 | I suspect (the docs don't explicitly state it as of 2.6) in the case where you don't use PIPEs communicate() is reduced to wait(). So if you don't use PIPEs it should be OK to replace wait().
In the case where you do use PIPEs you can overflow memory buffer (see communicate() note) just as you can fill up OS pipe buffe... | 1 | 16 | 0 | In the document of wait (http://docs.python.org/2/library/subprocess.html#subprocess.Popen.wait), it says:
Warning
This will deadlock when using stdout=PIPE and/or stderr=PIPE and the
child process generates enough output to a pipe such that it blocks
waiting for the OS pipe buffer to accept more data. Use communi... | When should I use `wait` instead of `communicate` in subprocess? | 1.2 | 0 | 0 | 6,735 |
13,522,975 | 2012-11-23T04:10:00.000 | 2 | 1 | 1 | 0 | python-2.7,pygame | 13,537,741 | 1 | true | 0 | 0 | I found a solution.
The latest version of Pygame is still able to play MPEG-1 files. The problem was that there are different encoding of MPEG-1.
The ones I found that works so far is Any Video Converter and Zamzar.com online converter. The downside to Zamzar is that it outputs really small version of the original vide... | 1 | 0 | 0 | I'm making a game using Python with PyGame module. I am trying to make an introduction screen for my game using a video that I made since it was easier to make a video than coding the animation for the intro screen.
The Pygame movie module does not work as stated on their site so I cannot use that. I tried using Pymedi... | Playing Video Files in Python | 1.2 | 0 | 0 | 1,309 |
13,523,115 | 2012-11-23T04:29:00.000 | 0 | 0 | 0 | 0 | python,beautifulsoup,scrapy | 13,560,416 | 2 | false | 1 | 0 | well the answer is you should try to parse couple of pages with HtmlSelector then Using beautiful Soup. and find some stats.
2ndly most of people use beautiful Soup even lxml for parsing because they already used to for using this.
Scrapy basic motive is Crawling if you are not comfortable with Xpath you can go with be... | 1 | 0 | 0 | I am doing crawling everything in scrapy.
I have seen that many people are using beautiful Soup for parsing.
I just wanted to know that is there any advantage in terms of speed , efficiency or more slectrors etc which help me in creating spiders and crawlers or scrapy alone should be enough for me | Can the use of Beautiful Soup with Scrapy increase the performance | 0 | 0 | 0 | 1,925 |
13,523,789 | 2012-11-23T05:55:00.000 | 1 | 0 | 0 | 0 | python,python-3.x | 13,533,315 | 1 | true | 0 | 0 | I encountered the same problem, and i solved it by chopping the file up and then sending the parts separately (load the file, send file[0:512], then send file[512:1024] and so on. Before sending the file i sent the length of the file to the receiver so the it would know when its done.
I know this probably isn't the bes... | 1 | 0 | 0 | Can someone give me a brief idea on how to transfer large files over the internet?
I tried with sockets, but it does not work. I am not sure what the size of receiving sockets should be. I tried with 1024 bytes. I send the data from one end and keep receiving it at the other end.
Is there any other way apart from socke... | Transfer a Big File Python | 1.2 | 0 | 1 | 1,410 |
13,525,032 | 2012-11-23T07:57:00.000 | 0 | 0 | 0 | 0 | python,pygtk | 13,541,432 | 1 | false | 0 | 1 | Not on PyGTK. If you are using GTK 3 then there is a CSS class, GtkProgressBar:pulse, but I can't find any documentation on how to change the width. It might be possible if you do some digging. | 1 | 1 | 0 | Is there any way to change the width of the block which is moving on gtk.ProgressBar.pulse()? | ProgressBar: set the width of the pulse block | 0 | 0 | 0 | 216 |
13,525,482 | 2012-11-23T08:39:00.000 | 1 | 1 | 0 | 0 | python,google-cloud-storage,file-exists | 13,644,827 | 13 | true | 1 | 0 | I guess there is no function to check directly if the file exists given its path.
I have created a function that uses the files.listdir() API function to list all the files in the bucket and match it against the file name that we want. It returns true if found and false if not. | 1 | 40 | 0 | I have a script where I want to check if a file exists in a bucket and if it doesn't then create one.
I tried using os.path.exists(file_path) where file_path = "/gs/testbucket", but I got a file not found error.
I know that I can use the files.listdir() API function to list all the files located at a path and then chec... | How to check if file exists in Google Cloud Storage? | 1.2 | 0 | 1 | 52,000 |
13,526,654 | 2012-11-23T09:57:00.000 | 0 | 0 | 0 | 0 | python,opencv,tracking | 13,530,687 | 2 | true | 0 | 0 | For a full proof track you need to combine more than one method...following are some of the hints...
if you have prior knowledge of the object then you can use template matching...but template matching is little process intensive...if you are using GPU then you might have some benefit
from your write up i presume exte... | 2 | 2 | 1 | I want to track a multicolored object(4 colors). Currently, I am parsing the image into HSV and applying multiple color filter ranges on the camera feed and finally adding up filtered images. Then I filter the contours based on area.
This method is quite stable most of the time but when the external light varies a bit... | Tracking a multicolor object | 1.2 | 0 | 0 | 475 |
13,526,654 | 2012-11-23T09:57:00.000 | 0 | 0 | 0 | 0 | python,opencv,tracking | 13,534,342 | 2 | false | 0 | 0 | You might try having multiple or an infinite number of models of the object depending upon the light sources available, and then classifying your object as either the object with one of the light sources or not the object. Note: this is a machine learning-type approach to the problem.
Filtering with a Kalman, extended... | 2 | 2 | 1 | I want to track a multicolored object(4 colors). Currently, I am parsing the image into HSV and applying multiple color filter ranges on the camera feed and finally adding up filtered images. Then I filter the contours based on area.
This method is quite stable most of the time but when the external light varies a bit... | Tracking a multicolor object | 0 | 0 | 0 | 475 |
13,532,170 | 2012-11-23T15:44:00.000 | 0 | 0 | 0 | 0 | java,python,scrapy | 13,584,941 | 2 | true | 1 | 0 | I doubt you can run twisted under jython and scrapy is based on twisted.
Not sure what you want to do but I recommend to run scrapyd and use the web service interface to communicate with java.
Can you give us more details on what you want to achieve? | 1 | 0 | 0 | Is it possible to use Scrapy from within a Java project?
With Jython for example, or maybe "indirect" solutions. | Scrapy inside java? | 1.2 | 0 | 0 | 1,443 |
13,534,541 | 2012-11-23T19:01:00.000 | 0 | 1 | 0 | 1 | python,linux,bash,ubuntu,sh | 13,534,648 | 6 | false | 0 | 0 | You can call poweroff from a script, as long as it's running with superuser privileges. | 1 | 2 | 0 | I want to write a script which can Shutdown remote Ubuntu system. Actually i want my VM to shutdown safely when i shutdown my main machine on which my VM is installed .
Is there is any of doing this with the help of Sh scripts or script written in any language like Python. | Script to Shutdown Ubuntu | 0 | 0 | 0 | 4,767 |
13,535,680 | 2012-11-23T21:00:00.000 | 1 | 0 | 1 | 0 | python,debugging | 13,554,896 | 4 | false | 0 | 0 | I don't know your case, but if you use threads or multiprocessing then your code is applicable for parallel processing (usually). In difficult cases I do everything just calling a function without pool, catch error and then go to pools again. | 1 | 7 | 0 | I have a python script that works with threads, processes, and connections to a database.
When I run my script, python crashes.
I cannot explicitly detect the case in which this happens.
Now I am looking for tools to get more information when python crashes,
or a viewer to see all my created processes/connections. | python debug tools for multiprocessing | 0.049958 | 0 | 0 | 3,774 |
13,536,952 | 2012-11-23T23:39:00.000 | 2 | 1 | 0 | 0 | python,winapi,pywin32,importerror,pythoncom | 53,436,989 | 1 | false | 0 | 0 | If you are using an IDE like I am (PyCharm), you should go the where the Python is installed e.g C:\Users\***\AppData\Local\Programs\Python\Python37\Lib\site-packages
In this folder check for the folder name pywin32. Copy that folder and paste it to C:\Users\***\PycharmProjects\project\venv\Lib\site-packages. After tha... | 1 | 3 | 0 | I am trying to import pythoncom, but it gives me this error: Traceback (most recent call last):
File "F:/Documents and Settings/Emery/Desktop/Python 27/Try", line 2, in
import pythoncom
File "F:\Python27\lib\site-packages\pythoncom.py", line 2, in
import pywintypes
ImportError: No module named pywintypes
... | win32 Python - pythoncom error - ImportError: No module named pywintypes | 0.379949 | 0 | 0 | 5,795 |
13,538,069 | 2012-11-24T03:50:00.000 | 1 | 0 | 0 | 0 | python,pygtk | 13,541,300 | 1 | true | 0 | 1 | The button contains a label, which you can access with get_child() and related functions. You can change the label's font size using the normal method. | 1 | 1 | 0 | I am developing Ubuntu app using the Unity tools (PyGTK + Python). I can change label font-size with no problem, but I cannot find same thing for button. How can I change button font-size?
The purpose of this is, i am developing an on-screen keypad, so the numerical text needs to be bigger so that it is easier to be se... | Glade + PyGTK Change Button Font Size | 1.2 | 0 | 0 | 2,417 |
13,542,698 | 2012-11-24T15:38:00.000 | 0 | 1 | 1 | 0 | python,apt | 13,552,981 | 2 | false | 0 | 0 | The use to fork is just a possibility I think. I've already try to redirect the sys.stdout even the sys.stderr : No Joy, it won't work. | 1 | 3 | 0 | I use python apt library and I would like that the commit() function doesn't produce any output.
I've searched on the web and saw that the fork function can do the trick but I don't know how to do that or if there exists another way. I don't use any GUI, I work via the terminal. | How to silence the commit function from the python apt library? | 0 | 0 | 0 | 256 |
13,543,069 | 2012-11-24T16:25:00.000 | 1 | 0 | 0 | 0 | python,random,graph,networkx,bellman-ford | 13,544,567 | 4 | true | 0 | 0 | I noticed that the generated graphs have always exactly one sink vertex which is the first vertex. You can reverse direction of all edges to get a graph with single source vertex. | 1 | 5 | 1 | I want to do a execution time analysis of the bellman ford algorithm on a large number of graphs and in order to do that I need to generate a large number of random DAGS with the possibility of having negative edge weights.
I am using networkx in python. There are a lot of random graph generators in the networkx librar... | how to create random single source random acyclic directed graphs with negative edge weights in python | 1.2 | 0 | 0 | 4,642 |
13,543,977 | 2012-11-24T17:59:00.000 | 4 | 0 | 1 | 0 | python,math,geometry,trigonometry | 13,544,035 | 2 | false | 0 | 0 | Sure, math module has atan2. math.atan2(y, x) is an angle (0, 0) to (x, y).
Also math.hypot(x, y) is distance form (0, 0) to (x, y). | 1 | 2 | 0 | First of all, I apologize to post this easy question. Probably there is a module to compute angle and distance between two points.
A = (560023.44957588764,6362057.3904932579)
B = (560036.44957588764,6362071.8904932579) | Python: Does a module exist which already find an angle and the distance between two points? | 0.379949 | 0 | 0 | 4,396 |
13,544,061 | 2012-11-24T18:10:00.000 | 1 | 1 | 0 | 0 | python,python-2.7,pycrypto | 13,544,093 | 2 | false | 0 | 0 | The compression method used by tar -z relies on repeating patterns in the input file, replacing these patterns by a count of how many times the pattern repeated (grossly simplified).
However, when you encrypt a file, you are basically trying to hide any repeating patterns in as much 'random'-looking noise as possible. ... | 2 | 1 | 0 | I created a encrypted file from a text file in python with beefish.
beefish uses pycrypto.
so my source text file is 33742 bytes and the encrypted version is 33752.
thats ok so far but ...
when I compress the test.enc (encrypted test file) with tar -czvf the final file is 33989 bytes. Why does the compression not work ... | compressed encrypted file is bigger then source | 0.099668 | 0 | 0 | 494 |
13,544,061 | 2012-11-24T18:10:00.000 | 7 | 1 | 0 | 0 | python,python-2.7,pycrypto | 13,544,079 | 2 | true | 0 | 0 | Compression works by identifying patterns in the data. Since you can't identify patterns in encrypted data (that's the whole point), you can't compress it.
For a perfect encryption algorithm that produced a 33,742 byte output, ideally all you would be able to determine about the decrypted original data is that it can f... | 2 | 1 | 0 | I created a encrypted file from a text file in python with beefish.
beefish uses pycrypto.
so my source text file is 33742 bytes and the encrypted version is 33752.
thats ok so far but ...
when I compress the test.enc (encrypted test file) with tar -czvf the final file is 33989 bytes. Why does the compression not work ... | compressed encrypted file is bigger then source | 1.2 | 0 | 0 | 494 |
13,544,715 | 2012-11-24T19:23:00.000 | 0 | 0 | 0 | 0 | python,linux,apache,web2py | 13,545,399 | 1 | false | 1 | 0 | Try testing the proxy theory by ssh -D tunneling to a server outside the proxy and seeing if that works for you. | 1 | 0 | 0 | I have deployed a web2py application on a server that is running on Apache web server.
All seems to be working fine, except for the fact that the web2py modules are not able to connect to an external website.
in web2py admin page, i get the following errors :
1. Unable to check for upgrades
2. Unable to download becau... | Web2py unable to access internet [connection refused] | 0 | 0 | 1 | 412 |
13,546,052 | 2012-11-24T22:00:00.000 | 0 | 0 | 1 | 0 | java,python,classpath | 13,546,113 | 4 | false | 0 | 0 | If you are using linux, you can use shell command: "type java" and parse output. | 3 | 6 | 0 | What is the best way to locate the jar containing core Java classes such as java.lang.Object? I have been using JAVA_HOME, but it turns out that that only works if the JDK is installed. How can I just find the standard library location that would be used if java were run from the commandline?
Also, I need to do this fr... | Locate Java standard library | 0 | 0 | 0 | 302 |
13,546,052 | 2012-11-24T22:00:00.000 | 0 | 0 | 1 | 0 | java,python,classpath | 13,546,607 | 4 | false | 0 | 0 | Python should have the means to find the location of "java" or "java.exe" executable. Follow all symbolic links to reveal the true location. My Python is rusty, but I think shutil.which and os.path.realpath will do the job.
The core classes will be in ../lib/rt.jar relative to the java executable. | 3 | 6 | 0 | What is the best way to locate the jar containing core Java classes such as java.lang.Object? I have been using JAVA_HOME, but it turns out that that only works if the JDK is installed. How can I just find the standard library location that would be used if java were run from the commandline?
Also, I need to do this fr... | Locate Java standard library | 0 | 0 | 0 | 302 |
13,546,052 | 2012-11-24T22:00:00.000 | 1 | 0 | 1 | 0 | java,python,classpath | 13,998,264 | 4 | false | 0 | 0 | Since there are no explicit restrictions on placing internal classes, then you should try handle all the possible (or as much as possible) places.
First of all, you should definitely look for java in PATH. Unfortunately, it will fail sometimes, for instance, you can often find java.exe in C:\Windows\System32. Fortunate... | 3 | 6 | 0 | What is the best way to locate the jar containing core Java classes such as java.lang.Object? I have been using JAVA_HOME, but it turns out that that only works if the JDK is installed. How can I just find the standard library location that would be used if java were run from the commandline?
Also, I need to do this fr... | Locate Java standard library | 0.049958 | 0 | 0 | 302 |
13,547,811 | 2012-11-25T02:41:00.000 | 0 | 0 | 0 | 0 | python,python-2.7,encryption | 33,747,010 | 2 | false | 0 | 0 | URL encryption will not save you in this situation. As your software runs in the client machine and somehow decrypts this URL and sends an HTTP request to it, any kid using Wireshark will be able to see your URL.
If the design of your system requires sensitive URLs, the safer way probably involves changes in the design... | 2 | 0 | 0 | I'm planning to compile my application to an executable file using Py2Exe. However, I have sensitive URL links in my application that I would like to remain hidden as in encrypted. Regardless if my application is decompiled, the links will still remain encrypted. How would I get say urllib2 to open the encrypted link?
... | Encrypting URLs in Python | 0 | 0 | 0 | 236 |
13,547,811 | 2012-11-25T02:41:00.000 | 0 | 0 | 0 | 0 | python,python-2.7,encryption | 13,547,837 | 2 | false | 0 | 0 | I don't think urllib2 has an option like it, though what you can do is save the link somewhere else (say a simple database, encrypt them (like a password) and when urllib2 calls the link, you check the hash.
Something like an user authentication. | 2 | 0 | 0 | I'm planning to compile my application to an executable file using Py2Exe. However, I have sensitive URL links in my application that I would like to remain hidden as in encrypted. Regardless if my application is decompiled, the links will still remain encrypted. How would I get say urllib2 to open the encrypted link?
... | Encrypting URLs in Python | 0 | 0 | 0 | 236 |
13,548,239 | 2012-11-25T04:20:00.000 | -1 | 0 | 0 | 0 | java,python,html | 13,548,265 | 3 | false | 1 | 0 | I don't know anything about Java or Python, but could you have it parse the html code and look for something like 'background-color: < color >'? | 1 | 1 | 0 | I am trying to detect color of different elements in a webpage(saved on machine). Currently I am trying to write a code in python. The initial approach which I followed is:
find color word in html file in different tags using regular expressions.
try to read the hex value.
But this approach is very stupid. I am new t... | Detect background color of a website | -0.066568 | 0 | 0 | 1,034 |
13,548,590 | 2012-11-25T05:29:00.000 | 0 | 0 | 0 | 1 | python,google-app-engine,web2py | 13,551,914 | 1 | false | 1 | 0 | App Engine datastore doesn't really have tables. That said, if web2py is able to make use of the datastore (I'm not familiar with it), then Kinds (a bit like tables) will only show up in the admin-console (/_ah/admin locally) once an entity has been created (i.e. tables only show up once one row has been inserted, you'... | 1 | 1 | 0 | I have created an app using web2py and have declared certain new table in it using the syntax
db.define_table() but the tables created are not visible when I run the app in Google App Engine even on my local server. The tables that web2py creates by itself like auth_user and others in auth are available.
What am I miss... | New tables created in web2py not seen when running in Google app Engine | 0 | 1 | 0 | 100 |
13,553,174 | 2012-11-25T16:51:00.000 | 2 | 1 | 0 | 0 | c++,python,boost,boost-python | 13,558,179 | 1 | false | 0 | 1 | Boost python is useful for exposing C++ objects to python.
Since you're talking about interacting with an already running application from python, and the lifetime of the script is shorter than the lifetime of the game server, I don't think boost python is what you're looking for, but rather some form of interprocess ... | 1 | 1 | 0 | I read few Boost.Python tutorials and I know how to call C++ function from Python. But what I want to do is create C++ application which will be running in the background all the time and Python script that will be able to call C++ function from that instance of C++ application. The C++ application will be a game serve... | Boost.Python - communication with running C++ program | 0.379949 | 0 | 0 | 426 |
13,554,241 | 2012-11-25T18:49:00.000 | 0 | 1 | 1 | 1 | python,module,installation | 13,555,251 | 2 | false | 0 | 0 | Install the module:
sudo pip-2.7 install guess_language
Validate import and functionality:
> Python2.7
>>> import guess_language
>>> print guess_language.guessLanguage(u"שלום לכם")
he | 1 | 1 | 0 | Is there any way to force python module to be installed in the following directory? /usr/lib/python2.7 | Force python module to be installed in certain directory | 0 | 0 | 0 | 70 |
13,555,278 | 2012-11-25T20:40:00.000 | 1 | 1 | 0 | 0 | c++,python,c,plugins,shared-libraries | 13,555,348 | 1 | false | 0 | 1 | Write your application in Python, then you can have a folder for your plugins.
Your application searches for them by checking the directory/traversing the plugin tree.
Then import them via "import" or use ctypes for a .so/.dll, or even easier: you can use boost::python for creating a .so/.dll that you can 'import' lik... | 1 | 0 | 0 | I want to create an application that is capable of loading plugins. The twist is that I want to be able to create plugins in both C/C++ and Python.
So I've started thinking about this and have a few questions that I'm hoping people can help me with.
My first question is whether I need to use C/C++ for the "core" of the... | Application that can load both C/C++ and Python plugins | 0.197375 | 0 | 0 | 648 |
13,559,133 | 2012-11-26T05:28:00.000 | 0 | 1 | 0 | 1 | python | 13,568,384 | 5 | false | 0 | 0 | Using catdoc/catppt with subprocess to open doc files and ppt files. | 1 | 3 | 0 | I want to open a ppt file using Python on linux, (like python open a .txt file).
I know win32com, but I am working on linux.
So, What do I need to do? | How to open ppt file using Python | 0 | 0 | 0 | 14,562 |
13,560,920 | 2012-11-26T08:11:00.000 | 1 | 0 | 1 | 0 | python,unicode | 13,560,959 | 3 | false | 0 | 0 | encode converts from a unicode string to a sequence of bytes. decode converts from a sequence of bytes to a unicode string. You want decode, because your data are already encoded.
More generally, if you're reading a string from an external source, you always want to decode, because there's no such thing as a "unicode... | 1 | 0 | 0 | I have some external data I need to import. How do I encode the input string as unicode/utf8?
Here is an example of a probematic line
>>>'Compa\xf1\xeda Dominicana de Tel\xe9fonos, C. por A. - CODETEL'.encode("utf8")
Traceback (most recent call last):
File "", line 1, in
UnicodeDecodeError: 'ascii... | UTF8 encoding error | 0.066568 | 0 | 0 | 2,722 |
13,571,993 | 2012-11-26T19:47:00.000 | 0 | 1 | 0 | 1 | python,sublimetext2 | 20,480,227 | 1 | true | 0 | 0 | Yes, you might want to give more detail. Have you made sure you have saved the file as .py? Try something simple like Print "Hello" and then see if this works. | 1 | 2 | 0 | I am a new user of Sublime text.
It has been working fine for a few days until it began to refuse to compile anything and I don't know where the problem is. I wrote python programs and pressed cmd+b and nothing happened. When I try to launch repl for this file - that also doesn't work. I haven't installed any plugins... | Build command in sublime text has stopped functioning | 1.2 | 0 | 0 | 182 |
13,572,454 | 2012-11-26T20:17:00.000 | 0 | 1 | 1 | 0 | python,nlp,nltk | 13,572,969 | 3 | false | 0 | 0 | You certainly can't do it in a general way for all languages, because different languages render sounds to text differently.
For example, the Hungarian word "vagy" looks like 2 syllables to an English speaker, but it's only one. And the English word "bike" would naturally be read as 2 syllables by speakers of many othe... | 2 | 3 | 0 | CMUdict works for the english language, but what if I want to count the syllables of content in another language? | Is there anyway in python to count syllables without the use of a dictionary? | 0 | 0 | 0 | 1,881 |
13,572,454 | 2012-11-26T20:17:00.000 | 2 | 1 | 1 | 0 | python,nlp,nltk | 13,572,478 | 3 | false | 0 | 0 | In general, no. For some languages there might be, but if you don't have a dictionary you'd need knowledge of those languages' linguistic structure. How words are divided into syllables varies from language to language. | 2 | 3 | 0 | CMUdict works for the english language, but what if I want to count the syllables of content in another language? | Is there anyway in python to count syllables without the use of a dictionary? | 0.132549 | 0 | 0 | 1,881 |
13,573,359 | 2012-11-26T21:20:00.000 | 2 | 0 | 0 | 0 | python,linux,mysql-python,bluehost | 13,573,647 | 2 | true | 1 | 0 | I think you upgraded your OS installation which in turn upgraded libmysqlclient and broke native extension. What you can do is reinstall libmysqlclient16 again (how to do it depends your particular OS) and that should fix your issue.
Other approach would be to uninstall MySQLdb module and reinstall it again, forcing py... | 2 | 2 | 0 | I have a shared hosting environment on Bluehost. I am running a custom installation of python(+ django) with a few installed modules. All has been working, until yesterday a change was made on the server(I assume) which gave me this django error:
... File "/****/****/.local/lib/python/django/utils/importlib.py", line ... | Python module issue | 1.2 | 1 | 0 | 2,446 |
13,573,359 | 2012-11-26T21:20:00.000 | 0 | 0 | 0 | 0 | python,linux,mysql-python,bluehost | 13,591,200 | 2 | false | 1 | 0 | You were right. Bluehost upgraded MySQL. Here is what I did:
1) remove the "build" directory in the "MySQL-python-1.2.3" directory
2) remove the egg
3) build the module again "python setup.py build"
4) install the module again "python setup.py install --prefix=$HOME/.local"
Morale of the story for me is to remove the o... | 2 | 2 | 0 | I have a shared hosting environment on Bluehost. I am running a custom installation of python(+ django) with a few installed modules. All has been working, until yesterday a change was made on the server(I assume) which gave me this django error:
... File "/****/****/.local/lib/python/django/utils/importlib.py", line ... | Python module issue | 0 | 1 | 0 | 2,446 |
13,574,528 | 2012-11-26T22:51:00.000 | 5 | 0 | 1 | 0 | python,string,copy | 13,574,540 | 1 | true | 0 | 0 | As long as you keep at least one reference to the string, it will not be garbage collected (and if you have no references left, then you have no way of accessing it anyway). | 1 | 0 | 0 | I have a class variable my_set which is a set, and into which I am adding strings:
MyClass.my_set.add(self.some_string_property)
My problem is that the instance of the class that runs the above may get garbage collected at any time, and when that happens I think I lose its some_string_property in my_set class variable.... | Create a copy of string | 1.2 | 0 | 0 | 259 |
13,575,952 | 2012-11-27T01:13:00.000 | 3 | 0 | 1 | 0 | python,random | 13,575,968 | 2 | false | 0 | 0 | I did some more research and found that I can use random.choice([1, 4, 7, 9, 13, 42]), which will randomly pick an item from the list. | 1 | 1 | 0 | I need to randomly select from the numbers [1, 4, 7, 9, 13, 42].
I can't use random.randint(1,42) because it would give me some of the numbers in-between. How do I select from only those numbers in my list? | How do you get a random number from a non-consecutive set? | 0.291313 | 0 | 0 | 1,024 |
13,576,887 | 2012-11-27T03:20:00.000 | 1 | 0 | 0 | 1 | python,ruby,terminal | 13,577,108 | 2 | false | 0 | 0 | Seems like you ought to just modify your $PATH to include /usr/local/Cellar before /usr/local/bin. Your shell will use the first one it finds. | 2 | 1 | 0 | Hey :) I'm working on a Mac with Mountain Lion, and installed both Ruby 1.9.3 and Python 2.7.3 from homebrew. However, which python and which ruby return that they are in /usr/local/bin/__, respectively. I would like them to read from /usr/local/Cellar/python or /usr/local/Cellar/ruby. How do I change their paths? | Changing default directories for python and ruby | 0.099668 | 0 | 0 | 60 |
13,576,887 | 2012-11-27T03:20:00.000 | 0 | 0 | 0 | 1 | python,ruby,terminal | 13,577,066 | 2 | false | 0 | 0 | I don't know on mac but on linux they're set up as links to /usr/local/bin/*
If you wanted to change the symbolic link you could run the command
ln -s /user/local/Celler/python /usr/local/bin/python which would make a new symbolic link.
Whether this works on OSX I can't confirm though.
Another method you might want to ... | 2 | 1 | 0 | Hey :) I'm working on a Mac with Mountain Lion, and installed both Ruby 1.9.3 and Python 2.7.3 from homebrew. However, which python and which ruby return that they are in /usr/local/bin/__, respectively. I would like them to read from /usr/local/Cellar/python or /usr/local/Cellar/ruby. How do I change their paths? | Changing default directories for python and ruby | 0 | 0 | 0 | 60 |
13,577,922 | 2012-11-27T05:28:00.000 | 3 | 0 | 0 | 0 | python,parsing,beautifulsoup,lxml | 13,578,055 | 1 | true | 1 | 0 | I don't really think this question makes a whole lot of sense. You need to give more explanation of what exactly your goals are. BeautifulSoup and lxml are two tools that in large part do the same things, but have different features and API philosophies and structure.
It's not a matter of "which gives you more contro... | 1 | 1 | 0 | I am learning to make spiders and crawlers. This spidering is my passion and I am going to do that for a long time. For parsing I am thinking of using BeautifulSoup. But some people say that if I use lxml, I will have more control.
Now I don't know much. But I am ready to work hard even if using lxml is harder. But if ... | Will I have more control over my spider if I use lxml over BeautifulSoup? | 1.2 | 0 | 1 | 120 |
13,578,170 | 2012-11-27T05:55:00.000 | 2 | 0 | 0 | 0 | python,scrapy | 13,584,851 | 1 | true | 1 | 0 | CrawlerSpider is a sub-class of BaseSpider : This is the calls you need to extend if you want your spider to follow links according to the "Rule" list.
"Crawler" is the main crawler sub-classed by CrawlerProcess.
You will have to sub-class CrawlerSpider in you spider but I don't think you will have to touch Crawler. | 1 | 3 | 0 | I am new to Scrapy and quite confused about crawler and spider. It seems that both of them can crawl the website and parse items.
There are a Crawler class(/usr/local/lib/python2.7/dist-packages/scrapy/crawler.py) and a CrawlerSpider class(/usr/local/lib/python2.7/dist-packages/scrapy/contrib/spiders/crawl.py) in Scra... | differences between scrapy.crawler and scrapy.spider? | 1.2 | 0 | 1 | 1,470 |
13,584,524 | 2012-11-27T12:43:00.000 | 0 | 0 | 0 | 0 | python,django,heroku | 13,678,321 | 2 | false | 1 | 0 | Why not store all of the assets on S3?
It sounds to me that they don't really need to be part of the application at all, but external resources that the application references. | 2 | 2 | 0 | In the old world I had a pretty ideal development setup going to work together with a webdesigner. Keep in mind we mostly do small/fast projects, so this is how it worked:
I have a staging site on a server (Webfaction or other)
Designer accesses that site and edits templates and assets to his satisfaction
I SSH in reg... | Minimal effort setup of Django for webdesigner | 0 | 0 | 0 | 215 |
13,584,524 | 2012-11-27T12:43:00.000 | 0 | 0 | 0 | 0 | python,django,heroku | 13,584,919 | 2 | false | 1 | 0 | How about a static 'showcase' site where all possible UI elements, templates, etc are shown using dummy content. The designer can connect, edit stuff and you merge in the changes in the end. Another option would be a test server with the full application running (kind of like you did it before) but with the option to c... | 2 | 2 | 0 | In the old world I had a pretty ideal development setup going to work together with a webdesigner. Keep in mind we mostly do small/fast projects, so this is how it worked:
I have a staging site on a server (Webfaction or other)
Designer accesses that site and edits templates and assets to his satisfaction
I SSH in reg... | Minimal effort setup of Django for webdesigner | 0 | 0 | 0 | 215 |
13,584,900 | 2012-11-27T13:04:00.000 | 1 | 0 | 0 | 0 | python,opengl,ctypes,pyopengl | 13,585,375 | 1 | true | 0 | 1 | Are there any scenarios I'm missing?
Buffer mappings obtained through glMapBuffer | 1 | 1 | 1 | PyOpenGL docs say:
Because of the way OpenGL and ctypes handle, for instance, pointers, to array data, it is often necessary to ensure that a Python data-structure is retained (i.e. not garbage collected). This is done by storing the data in an array of data-values that are indexed by a context-specific key. The fun... | What is PyOpenGL's "context specific data"? | 1.2 | 0 | 0 | 176 |
13,585,238 | 2012-11-27T13:25:00.000 | 1 | 0 | 0 | 1 | python,multiprocessing | 13,585,552 | 2 | false | 0 | 0 | use a pipe.
Ceate two processes using the subprocess module, the first reads from the serial port and writes the set of hex codes to stdout. This is piped to the second process which reads from stdin and updates the database. | 1 | 2 | 0 | Hi I am using Serial port communication to one of my device using python codes. It is sending a set of Hex code, Receives a set of data. process it.
This data has to be stored in to a database.
I have another script that has MYSQLdb library pushing it in to the database.
If I do that in sequentially in one script i los... | Subprocess in Reading Serial Port Read | 0.099668 | 0 | 0 | 2,531 |
13,587,602 | 2012-11-27T15:34:00.000 | 1 | 0 | 1 | 0 | python,debugging | 13,590,019 | 2 | false | 0 | 0 | Except decorators, for Python >= 3.0 you could use new __getattribute__ method for a class, which will be called every time you call any method of the object.
You could look through Lutz "Learning Python" chapters 31, 37 about it. | 1 | 2 | 0 | What is the easiest way to record function calls for debugging in Python? I'm usually interested in particular functions or all functions from a given class. Or sometimes even all functions called on a particular object attribute. Seeing the call arguments would be useful, too.
I can imagine writing decorators for all ... | Watching which function is called in Python | 0.099668 | 0 | 0 | 241 |
13,588,125 | 2012-11-27T16:00:00.000 | 1 | 0 | 1 | 0 | python,python-2.7,bytearray,stringio | 13,588,563 | 1 | false | 0 | 0 | Instead of using += you might have better luck creating a list and appending the data to the end of it. When all the data has been fetched you can then do a ''.join(list) to create a single string. This will preform much better since string concatenations are inefficient.
When you concatenate two strings python has to... | 1 | 0 | 0 | I met a strange problem recently, hope someone here can help me out. I'm using Python2.7 in Ubuntu12.04, both python and OS are 64-bits.
In my code, I need to keep appending incoming data stream to a byte array,
I use self.data += incomingdata to implement this, where incomingdata is the data I received from hardware d... | different between stringio.write and += on byte stream | 0.197375 | 0 | 0 | 407 |
13,588,454 | 2012-11-27T16:17:00.000 | 43 | 0 | 1 | 1 | python,cygwin | 13,588,963 | 8 | true | 0 | 0 | The problem is that due to the way that the Cygwin terminal (MinTTY) behaves, the native Windows build of Python doesn't realize that stdout is a terminal device -- it thinks it's a pipe, so it runs in non-interactive mode instead of interactive mode, and it fully buffers its output instead of line-buffering it.
The re... | 2 | 40 | 0 | Installing a new Windows system, I've installed CygWin and 64
bit Python (2.7.3) in their default locations (c:\cygwin and
c:\Python27\python), and added both the CygWin bin and the
Python directory to my path (in the user variable PATH). From
the normal command window, Python starts up perfectly, but when
I invoke it... | Invoking python under CygWin on Windows hangs | 1.2 | 0 | 0 | 23,262 |
13,588,454 | 2012-11-27T16:17:00.000 | -1 | 0 | 1 | 1 | python,cygwin | 48,180,292 | 8 | false | 0 | 0 | Reinstall mintty with cygwin setup. Didn't have to use python -i after that. | 2 | 40 | 0 | Installing a new Windows system, I've installed CygWin and 64
bit Python (2.7.3) in their default locations (c:\cygwin and
c:\Python27\python), and added both the CygWin bin and the
Python directory to my path (in the user variable PATH). From
the normal command window, Python starts up perfectly, but when
I invoke it... | Invoking python under CygWin on Windows hangs | -0.024995 | 0 | 0 | 23,262 |
13,588,908 | 2012-11-27T16:41:00.000 | 3 | 0 | 0 | 0 | python,tkinter | 13,590,474 | 3 | false | 0 | 1 | The background colors will not automatically change. Tkinter has the ability to do such a thing with fonts but not with colors.
You will have to write some code to iterate over all of the widgets and change their background colors. | 1 | 9 | 0 | I have a simple tkinter window. It consists of a small window, a timer, and a button to set timer. I don't want to go in details with the code.
I want to change the background of all the widgets in my window(buttons, label, Etc.).
My first thought is to use a global variable which I will set to "red" for example, and a... | Dynamically change widget background color in Tkinter | 0.197375 | 0 | 0 | 21,940 |
13,589,075 | 2012-11-27T16:50:00.000 | 0 | 1 | 1 | 1 | python,linux,gcc,g++,python-2.6 | 13,590,180 | 1 | true | 0 | 0 | I was able to solve my problem by manually editing the Makefile generated by the configure script so that the linker was using g++ instead of gcc and that solved my problems. Thanks for the possible suggestions! | 1 | 0 | 0 | I have a custom C++ Python Module that I want to build into Python that builds fine but fails when it goes to the linking stage. I have determined that the problem is that it is using the gcc to link and not g++ and this is what is causing all of the errors I am seeing when it tries to link in the std libraries. How wo... | C++ Python Module not being linked into Python with g++ | 1.2 | 0 | 0 | 85 |
13,589,417 | 2012-11-27T17:12:00.000 | 0 | 0 | 0 | 0 | python,django | 13,590,715 | 4 | false | 1 | 0 | Another way to solve this is by adding javascript that disable the "other" fields when you set one. You can then enforce this in the form/model validation.
But I should say that I think the best way to deal with this, if it can be applied to your problem, is the way PT114 propose. | 1 | 0 | 0 | We have three properties on my animal model:
dog_name
cat_name
monkey_name
One of them must be filled (no more! animal is a dog, a cat or a monkey) and if I set for example cat_name, I want dog_name and monkey_name to be deactivated (user shouldn't set more than one name).
Is it possible to set this in django admin... | Deactivating needless properties in Django Admin | 0 | 0 | 0 | 57 |
13,591,170 | 2012-11-27T19:01:00.000 | 1 | 0 | 0 | 0 | python,django,django-models | 13,591,321 | 1 | false | 1 | 0 | Well you already know it is because of mutual dependencies. The way around it would be to split the util file in to two so, that you could avoid circular imports by separating the parts where you are required to call the models.
Also, as suggested by Mipadi instead of using a global import statement you could simply ma... | 1 | 0 | 0 | In my Django app (lets call it app) I have a number of files: views.py, models.py and I created my own utils.py.
Unfortunately, while I can include my models in my views.py file simply by saying
from models import *
In my utils.py file, if I try the same thing, and then work with a model, I get an exception Global nam... | Django cannot import from app/models.py | 0.197375 | 0 | 0 | 426 |
13,592,618 | 2012-11-27T20:38:00.000 | 18 | 0 | 1 | 0 | python,thread-safety,pandas | 13,593,942 | 2 | true | 0 | 0 | The data in the underlying ndarrays can be accessed in a threadsafe manner, and modified at your own risk. Deleting data would be difficult as changing the size of a DataFrame usually requires creating a new object. I'd like to change this at some point in the future. | 1 | 22 | 1 | I am using multiple threads to access and delete data in my pandas dataframe. Because of this, I am wondering is pandas dataframe threadsafe? | python pandas dataframe thread safe? | 1.2 | 0 | 0 | 17,987 |
13,593,594 | 2012-11-27T21:40:00.000 | 0 | 0 | 1 | 1 | python,deployment,python-3.2 | 13,671,961 | 2 | false | 0 | 0 | Have you looked at buildout (zc.buildout)? With a custom recipe you may be able to automate most of this. | 1 | 5 | 0 | I'm not happy with the way that I currently deploy Python code and I was wondering if there is a better way. First I'll explain what I'm doing, then the drawbacks:
When I develop, I use virtualenv to do dependancy isolation and install all libraries using pip. Python itself comes from my OS (Ubuntu)
Then I build my ... | How to distribute and deploy Python 3 code with dependency isolation | 0 | 0 | 0 | 1,205 |
13,593,922 | 2012-11-27T22:00:00.000 | 1 | 0 | 1 | 0 | python,windows,command-prompt | 13,594,149 | 4 | false | 0 | 0 | Changing your PATH environment variable should do the trick. Some troubleshooting tips:
Make sure you didn't just change the local, but rather the system variable to reflect the new location
Make sure you restarted your CL window (aka close "cmd" or command prompt and reopen it). This will refresh the system variabl... | 1 | 2 | 0 | My command prompt is currently running Python 3.2 by default how do I set it up to run Python 2.7 by default, I have changed the PATH variable to point towards Python 2.7, but that did not work.
UPDATE:
It still does not work. :(
Still running python3 - to be specific it runs python3 when I am trying to install flask ... | Command Prompt: Set up for Python 2.7 by default | 0.049958 | 0 | 0 | 8,222 |
13,594,164 | 2012-11-27T22:17:00.000 | 1 | 0 | 0 | 0 | python,django,dotcloud | 13,594,735 | 2 | false | 1 | 0 | If you are using a requirements.txt, no, there is not a way to do that from pypi, since Dotcloud is simply downloading the packages you've specified from pypi, and obviously your changes within your virtualenv are not going to be reflected by the canonical versions of the packages.
In order to use the edited versions o... | 2 | 1 | 0 | I'm deploying my Django app with Dotcloud. While developing locally, I had to make changes inside the code of some dependencies (that are in my virtualenv).
So my question is: is there a way to make the same changes on the dependencies (for example django-registration or django_socketio) while deploying on dotcloud?
Th... | Change dependencies code on dotcloud. Django | 0.099668 | 0 | 0 | 67 |
13,594,164 | 2012-11-27T22:17:00.000 | 1 | 0 | 0 | 0 | python,django,dotcloud | 13,594,763 | 2 | true | 1 | 0 | There are many ways, but not all of them are clean/easy/possible.
If those dependencies are on github, bitbucket, or a similar code repository, you can:
fork the dependency,
edit your fork,
point to the fork in your requirements.txt file.
This will allow you to track further changes to those dependencies, and easily ... | 2 | 1 | 0 | I'm deploying my Django app with Dotcloud. While developing locally, I had to make changes inside the code of some dependencies (that are in my virtualenv).
So my question is: is there a way to make the same changes on the dependencies (for example django-registration or django_socketio) while deploying on dotcloud?
Th... | Change dependencies code on dotcloud. Django | 1.2 | 0 | 0 | 67 |
13,594,953 | 2012-11-27T23:15:00.000 | 0 | 0 | 1 | 0 | windows,numpy,python-2.7,64-bit | 13,595,084 | 2 | true | 0 | 0 | It should work if you're using 32-bit Python. If you're using 64-bit Python you'll need 64-bit Numpy. | 2 | 0 | 1 | I have read several related posts about installing numpy for python version 2.7 on a 64 bit windows7 OS. Before I try these, does anybody know if the 32bit version will work on a 64bit system? | numpy for 64 bit windows | 1.2 | 0 | 0 | 380 |
13,594,953 | 2012-11-27T23:15:00.000 | 0 | 0 | 1 | 0 | windows,numpy,python-2.7,64-bit | 33,553,807 | 2 | false | 0 | 0 | If you are getting it from pip and you want a 64 bit version of NumPy, you need MSVS 2008. pip needs to compile NumPy module with the same compiler that Python binary was compiled with.
The last I checked (this Summer), python's build.py on Windows only supported up to that version of MSVS. Probably because build.py ... | 2 | 0 | 1 | I have read several related posts about installing numpy for python version 2.7 on a 64 bit windows7 OS. Before I try these, does anybody know if the 32bit version will work on a 64bit system? | numpy for 64 bit windows | 0 | 0 | 0 | 380 |
13,596,505 | 2012-11-28T01:53:00.000 | 5 | 0 | 1 | 1 | python,windows,windows-8,command | 29,402,992 | 23 | false | 0 | 0 | I am probably the most novice user here, I have spent six hours just to run python in the command line in Windows 8. Once I installed the 64-bit version, then I uninstalled it and replaced it with 32-bit version. Then, I tried most suggestions here, especially by defining path in the system variables, but still it didn... | 11 | 116 | 0 | When I type python into the command line, the command prompt says python is not recognized as an internal or external command, operable program, or batch file. What should I do?
Note: I have Python 2.7 and Python 3.2 installed on my computer. | Python command not working in command prompt | 0.043451 | 0 | 0 | 713,166 |
13,596,505 | 2012-11-28T01:53:00.000 | 4 | 0 | 1 | 1 | python,windows,windows-8,command | 71,605,377 | 23 | false | 0 | 0 | Python 3.10 uses py and not python.
Try py --version if you are using this version. | 11 | 116 | 0 | When I type python into the command line, the command prompt says python is not recognized as an internal or external command, operable program, or batch file. What should I do?
Note: I have Python 2.7 and Python 3.2 installed on my computer. | Python command not working in command prompt | 0.034769 | 0 | 0 | 713,166 |
13,596,505 | 2012-11-28T01:53:00.000 | 1 | 0 | 1 | 1 | python,windows,windows-8,command | 61,078,712 | 23 | false | 0 | 0 | I wanted to add a common problem that happens on installation. It is possible that the path installation length is too long. To avoid this change the standard path so that it is shorter than 250 characters.
I realized this when I installed the software and did a custom installation, on a WIN10 operation system. In the... | 11 | 116 | 0 | When I type python into the command line, the command prompt says python is not recognized as an internal or external command, operable program, or batch file. What should I do?
Note: I have Python 2.7 and Python 3.2 installed on my computer. | Python command not working in command prompt | 0.008695 | 0 | 0 | 713,166 |
13,596,505 | 2012-11-28T01:53:00.000 | 4 | 0 | 1 | 1 | python,windows,windows-8,command | 60,397,519 | 23 | false | 0 | 0 | Even after following the instructions from the valuable answers above, calling python from the command line would open the Microsoft Store and redirect me to a page to download the software.
I discovered this was caused by a 0 Ko python.exe file in AppData\Local\Microsoft\WindowsApps which was taking precedence over m... | 11 | 116 | 0 | When I type python into the command line, the command prompt says python is not recognized as an internal or external command, operable program, or batch file. What should I do?
Note: I have Python 2.7 and Python 3.2 installed on my computer. | Python command not working in command prompt | 0.034769 | 0 | 0 | 713,166 |
13,596,505 | 2012-11-28T01:53:00.000 | 3 | 0 | 1 | 1 | python,windows,windows-8,command | 52,572,393 | 23 | false | 0 | 0 | Here's one for for office workers using a computer shared by others.
I did put my user path in path and created the PYTHONPATH variables in my computer's PATH variable. Its listed under Environment Variables in Computer Properties -> Advanced Settings in Windows 7.
Example:
C:\Users\randuser\AppData\Local\Programs\Pyt... | 11 | 116 | 0 | When I type python into the command line, the command prompt says python is not recognized as an internal or external command, operable program, or batch file. What should I do?
Note: I have Python 2.7 and Python 3.2 installed on my computer. | Python command not working in command prompt | 0.026081 | 0 | 0 | 713,166 |
Subsets and Splits
No community queries yet
The top public SQL queries from the community will appear here once available.