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• File size in Python server

  - by Anna

  We have server on Python and client + web service on Ruby. That works only if file from URL is less than 800 k. It seems like "socket.puts data" in a client works, but "output = socket.gets" - not. I think problem is in a Python part. For big files tests run "Connection reset by peer". Is it buffer size variable by default somewhere in a Python?

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• Python: Using `copyreg` to define reducers for types that already have reducers

  - by cool-RR

  (Keep in mind I'm working in Python 3, so a solution needs to work in Python 3.) I would like to use the copyreg module to teach Python how to pickle functions. When I tried to do it, the _Pickler object would still try to pickle functions using the save_global function. (Which doesn't work for unbound methods, and that's the motivation for doing this.) It seems like _Pickler first tries to look in its own dispatch for the type of the object that you want to pickle before looking in copyreg.dispatch_table. I'm not sure if this is intentional. Is there any way for me to tell Python to pickle functions with the reducer that I provide?

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• Stopping long-running requests in Pylons

  - by Jack

  I'm working on an application using Pylons and I was wondering if there was a way to make sure it doesn't spend way too much time handling one request. That is, I would like to find a way to put a timer on each request such that when too much time elapses, the request just stops (and possibly returns some kind of error). The application is supposed to allow users to run some complex calculations but I would like to make sure that if a calculation starts taking too much time, we stop it to allow other calculations to take place.

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• Programatically importing a file and creating an instance of a class in Python

  - by benofsky

  I have a (python) list of strings which refer to python source files and subsequently classes within those files which I want to import and then create an instance of the classes within the files (everything follows a strict naming convention, making this theoretically possible), in Ruby I would do something like: require "lib/sources/#{source}.rb" s = source.constantize.new How would I do something similar in Python? Thanks, Ben

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• Using Variables for Class Names in Python?

  - by Sam McAfee

  I want to know how to use variables for objects and function names in Python. In PHP, you can do this: $className = "MyClass"; $newObject = new $className(); How do you do this sort of thing in Python? Or, am I totally not appreciating some fundamental difference with Python, and if so, what is it?

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• python: where to put application data that can be edited by computer users

  - by Jason S

  I'm working on a really simple python package for our internal use, and want to package it as a .egg file, and when it's installed/used I want it to access a text file that is placed in an appropriate place on the computer. So where is the best place to put application data in python? (that is meant to be edited by users) How do I get my python package to automatically install a default file there?

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• Tree libraries in python

  - by uhbif19

  Hi , do you now any python libraries , for data trees

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• Unexpected output using subprocess in Python

  - by Vic

  I am trying to run a shell command from within my Python (version 2.6.5) code, but it is generating different output than the same command run within the shell (bash): bash: ~> ifconfig eth0 | sed -rn 's/inet addr:(([0-9]{1,3}\.){3}[0-9]{1,3}).*/\1/p' | sed 's/^[ \t]*//;s/[ \t]*$//' 192.168.1.10 Python: >>> def get_ip(): ... cmd_string = "ifconfig eth0 | sed -rn \'s/inet addr:(([0-9]{1,3}\.){3}[0-9]{1,3}).*/\1/p' | sed 's/^[ \t]*//;s/[ \t]*$//\'" ... process = subprocess.Popen(cmd_string, shell=True, stdout=subprocess.PIPE) ... out, err = process.communicate() ... return out ... >>> get_ip() '\x01\n' My guess is that I need to escape the quotes somehow when running in python, but I am not sure how to go about this. NOTE: I cannot install additional modules or update python on the machine that this code needs to be run on. It needs to work as-is with Python 2.6.5 and the standard library.

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• Python urlparse, correct or incorrect?

  - by omfgroflmao

  Python's urlparse function parses an url into six components (scheme, netloc, path and others stuff) Now I've found that parsing "example.com/path/file.ext" return no netloc but a path "example.com/path/file.ext". Should't it be netloc = "example.com" and path = "/path/file.ext"? Do we really need a "://" to determine wether or not a netloc exists? Python's ticket: http://bugs.python.org/issue8284

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• Question about python modules

  - by morpheous

  I have recently started learning Python and I have 2 questions relating to modules. Is there a way to obtain a list of Python modules available (i.e. installed) on a mchine? I am using Ubuntum Karmic and Synaptic for package management. I have just installed a python module.Where is the module code actually stored on my machine? (is there a default [recommended] location that modules are stored)?

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• CURL alternative in Python

  - by Gaurav

  I have a cURL call that I use in PHP: curl -i -H 'Accept: application/xml' -u login:key "https://app.streamsend.com/emails" I need a way to do the same thing in Python. Is there an alternative to cURL in Python. I know of urllib but I'm a Python noob and have no idea how to use it.

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• Java/Python: Integration, problem with looping updating text

  - by Jivings

  Hello! Basically I have a script in Python that grabs the text from an open window using getWindowText() and outputs it to the screen. The python loops so as the text in the window changes, it outputs the changes, so the output of the python will always be up to date with the window text. I'm trying to access this text in my Java program by executing the python script as a process and reading the text it outputs using a buffered reader. For some reason this works fine for the first block of text, but will not read any more after this, it wont read any updates to the text as the python outputs it. Can someone shed some light on this? I'm about to try and use Jython, but I'd really like to know what the problem is here... try { Runtime r = Runtime.getRuntime(); Process p = r.exec("cmd /c getText.py"); BufferedReader br = new BufferedReader( new InputStreamReader(p.getInputStream())); int line; while (true) { line = br.read(); System.out.print((char) line); } } catch (Exception e) { e.printStackTrace(); }

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• Controlling rsync with Python?

  - by Cheesemold

  I've been wanting to write a python script that would run several instances of rsync in sequence for backing up data to a different computer. At the moment I just have this text file with the commands I use and I've just been copy-pasting them into the terminal, and it seems kinda silly. I want to be able to use python to do this for me. I know very vaguely how to use subprocess.popen, but I have no clue how to get python to interact with rsync directly, like for entering my password for me. Can python do that? Something like: if theProccess.proccessResponse == "Password:" : theProccess.respond(string) Or is the best that I can do is just have it, or even a bash script, just run the rsyncs in sequence and have to type my password in over and over again? Thanks in advance.

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• Micropython or minimal python installation

  - by reshefm

  I once read about minimal python installation without a lot of the libraries that come with the python default installation but could not find it on the web... What I want to do is to just pack a script with the python stuff required to execute it and make portable. Does any one know about something like that? Thanks

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• Save the output of a command in a string in linux using python

  - by user1657901

  I am using Fedora 17 xfce and I am programming in Python 2.7.3. Fedora uses a package manager called yum. I have a python script that searches for packages like this: import os package = raw_input("Enter package name to search: ") os.system("yum list " + package) So I want python to check if in the output of this command exists the words "No matching packages to list". I checked a similar question and I tried some methods [http://stackoverflow.com/questions/2502833/python-store-output-of-subprocess-call-in-a-string][1] but the string contained only the first line of the output. Thanks in advance

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• Making swedish characthers show properly in Windows Command Prompt using Python in Notepad++

  - by Alex

  The title explains it well. I have set up Notepad++ to open the python script in the command prompt when I press F8 but all Swedish characters looks messed up when opening in CMD but perfectly fine in e.g IDLE. This simple example code: #!/usr/bin/env python #-*- coding: UTF-8 -*- print "åäö" Looks like this. As you can see the output of the bath file I use to open Python in cmd below shows the characthers correctly but not the python script above it. How do i fic this?

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• python programming [closed]

  - by kutti

  How can I think to solve python problems?

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• syntax difference between ruby and python?

  - by fayer

  i wonder if there are tutorials that go through the syntax differences for ruby and python? i have seen a comparison between ruby and php but not between ruby and python. i have looked at both ruby and python but it would be very useful with this side-by-side comparison for deciding which one to choose. thanks

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• Java's equivalence to Python's "Got value: %s" % variable?

  - by Viet

  Java's equivalence to Python's "Got value: %s" % variable?

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• How to install Python newt or snack in Mac OS X for byobu

  - by caleban

  I've installed byobu in Mac OS X 10.6.5. It will start, (i.e. it will start a screen session) but in order to run byobu-config and probably in order to do some other things I need a module called snack which apparently is part of python newt. pip search newt and pip search snack return no results. newt and snack aren't in MacPorts or Brew either. I haven't found anything online in my searching with respect to installing newt on Mac OS X. Has anyone else been able to install byobu and newt in Mac OS X?

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• How can i remove some installed python modules in centos

  - by user1513613

  I am getting ths error Python 2.7.5 (default, Jul 2 2013, 13:33:13) [GCC 4.4.7 20120313 (Red Hat 4.4.7-3)] on linux2 Type "help", "copyright", "credits" or "license" for more information. >>> import MySQLdb Traceback (most recent call last): File "<stdin>", line 1, in <module> File "MySQLdb/__init__.py", line 23, in <module> (version_info, _mysql.version_info)) ImportError: this is MySQLdb version (1, 2, 4, 'final', 1), but _mysql is version (1, 2, 3, 'final', 0) >>> Now i dont know how i have installed that. i treid so many things like yum , pip easy, install etc. how can i remove all versions of MysqlDB FROM THERE

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• Python installation in OSX not updating

  - by ElendilTheTall

  I've recently got into Python programming and so downloaded the latest version (3.2.3) to install on my Mac running Snow Leopard. I used the installer package. I have run the shell profile update script, but Terminal is still using 2.6.1 to run my programs. I have tried changing the paths with sudo nano as per this post but it makes no difference - it still uses 2.6.1 Any ideas, oh mighty Super Users? I am a complete noob when it comes to Terminal commands.

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• How to Install Python 2.6 on Fedora 8?

  - by Apreche

  I don't want to use Fedora 8. I would be very happy to use the newest version, but there is no choice. My problem is that 8 comes with python 2.5. I am trying to upgrade it to 2.6, but with no luck. The only caveat is that I don't want to just install directly from source. I want to do it through the package manager using an rpm. I have tried building my own rpm from source using rpmbuild. I have tried using src rpms from newer versions of Fedora. I've tried these CentOS instructions. Nothing seems to actually result in an rpm file that installs successfully. I have also tried extensive Google searching, and have been unsurprisingly unable to find any rpms that work, or working instructions to build my own rpm.

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• Redirect output of Python program to /dev/null

  - by STM

  I have a Python executable, written and compiled by somebody else, that I simply need to run once halfway down my own bash script. The program uses a text-based UI, therefore waits for input before proceeding, but the key operations it performs when starting are required in my bash script. A messy (and strange) procedure I know, but unfortunately I haven't got any other options. I've gotten around forcefully closing the program with a kill signal, but the program's TUI insists on outputting to wherever it's run. I've tried redirecting both stdout and stderr to /dev/null and running the program in the background by suffixing an ampersand, but simply can't get it to play ball. I believe the cause is the program spawns other processes, and the output redirection of the parent process doesn't affect them. Is there any trick I can utilise to redirect all output from child processes too?

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• Difference between sending data via UDP in Bash and with a Python script

  - by Kevin Burke

  I'm on a Centos box, trying to send a UDP packet to port 8125 on localhost. When I run this Python script: import socket sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM) sock.sendto('blah', ("127.0.0.1", 8125)) The data appears where it should on port 8125. However when I send the data like this: echo "blah" | nc -4u -w1 127.0.0.1 8125 Or like this: echo "blah" > /dev/udp/127.0.0.1/8125 The data does not appear in the backend. I know this is horribly vague but it's UDP and it's hard to determine why one packet is being sent and the other is not. Do you have any ideas about how to debug this issue further? I'm on a Centos machine.

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