Python is an interpreted, general-purpose high-level programming language whose design philosophy emphasizes code readability.

learn more… | top users | synonyms

4
votes
3answers
11k views

Running python script from terminal without .py extension

I want to call a python script script.py from the terminal by simply typing script. Is this possible? If so, how? I know I can avoid typing python script.py by adding #!/usr/bin/env python to the top ...
4
votes
1answer
1k views

How to get the name of the user that launched `sudo`

My problem: I have a Python program, and the user launch it using sudo. Sometimes I have to get the user's home, and I can do this only knowing its name: import pwd pwd.getpwnam(username) So: how ...
4
votes
2answers
585 views

Creating deb and rpm from the same source

Is there a standard for source packages to be able to build rpms, debs (and perhaps others) without too much customization? I'm talking mostly about Python, PyQt programs.
4
votes
3answers
3k views

Sending the output from 'dd' to awk/sed/grep

I'm trying to approximate the computer's write speed using dd: dd if=/dev/urandom of=/dev/null bs=1K count=10000 which gives the following output 10000+0 records in 10000+0 records out 10240000 ...
4
votes
2answers
11k views

What is the python equivalent of grep -v?

I like grep -v. I use it all the time. But I am also doing some text processing in python, and there is one crucial thing that I lack. Usually, I use grep -v to take extraneous stuff out of text. ...
4
votes
1answer
3k views

Upgrade matplotlib to 1.2 or 1.3

I am trying to upgrade my python matplotlib but for some reason I can't get it to upgrade. I originally installed matplotlib with: apt-get install python-matplotlib which was fine. However it ...
4
votes
1answer
1k views

apt python error prevents me from resolving dependency problems for apt-get install

On Debian 6 servers dependency issues are preventing me from installing nis (or any package). When I try to resolve that issue I get a python error. How do I get past this issue and re-gain the ...
4
votes
2answers
262 views

Aliasing 'python' to 'ipython' only when 'python' is run without args

I thought it would be nice to have an alias (in ~/.zshrc) to have 'python' aliased to 'ipython' ONLY when 'python' is run without args (otherwise, programs won't launch). First of all, how to express ...
4
votes
1answer
687 views

Reading amount of tracks from an audio CD?

I'm writing a little script to analyze audio CDs. I'm specifically looking for a way to grab the track count from the CD, either from a shell-script or from Python. Is there an easy way to do this? ...
4
votes
2answers
839 views

Wait for a X window to appear/disappear (in a sane way)

Inside a shell script, I need to wait for a window that has a string on its title to appear, do some action, and then wait for it to disappear, and do some other action. Until yesterday, I had this ...
4
votes
1answer
880 views

How to use cron + python to regularly adjust screen brightness?

I want to use cron and this script (http://askubuntu.com/questions/23593/use-webcam-to-sense-lighting-condition-and-adjust-screen-brightness): import opencv import opencv.highgui import time import ...
4
votes
1answer
836 views

How do I make Kate indent with spaces on Python files but use tabs for text files and other files?

My goal is to set Kate up to work properly on Python files but to use different settings (tabs not spaces) on other documents. I'm sure others are doing this, but I can't figure out a convenient ...
4
votes
3answers
2k views

Python 2.7 and 2.6 coexist on the same machine

I want to follow a guide to install some software on a ReadyNas Duo (sparc). The guide indicates I need python 2.7, but I already have 2.6 installed. ~# which python /usr/bin/python ~# ls -al ...
4
votes
6answers
452 views

What is the easiest way to check if column A and B values goes both ways with AWK? [closed]

What is the easiest way to check if column A and B values goes both ways? Output to check: Mike John John Mike Pamela Barbara Barbara Pamela Mike Paul Roger Paul Desired output Mike <-> ...
4
votes
2answers
74 views

Tilling window manager written in Python

Is there any tiling manager like XMonad but written with Python? I think Haskell was too hard for me. But I know python a little.
4
votes
1answer
355 views

How Can I Automate the Change between a Python Script and a Nohup Python Script?

I have a Raspberry Pi connected to a digital temperature probe, which measures my fermenting beer. A python script reads the temperature every second and prints it to the console, and stores it in a ...
4
votes
1answer
176 views

certificate errors trying to create a virtualenv on old Ubuntu

On an old Ubuntu 8.04 (cannot upgrade yet) I need to create a Python virtualenv, install some packages and then my software. I do get certificate errors: Could not fetch URL ...
4
votes
1answer
4k views

Python not recognizing LD_LIBRARY_PATH?

I am trying to install Python2.7 on cr-48 chromebook in developer mode, and face a weird issue that I am having hard time searching for a solution on google. First some background.. the root partition ...
4
votes
2answers
668 views

fail2ban log parsing too slow on Raspberry Pi - options?

I'm running fail2ban on a Raspberry Pi at 950MHz which I cannot overclock further. The Pi is occasionally subject to SYN floods on particular ports. I've set up iptables to throttle the rate of SYNs ...
4
votes
1answer
2k views

How can I run tcpdump from a Python script without AppArmor complaining?

For inconvenient reasons going beyond the scope of this question, I have to run tcpdump from within a Python script. I currently just call subprocess.Popen(['tcpdump', ...) and everything works just ...
4
votes
1answer
4k views

How to do a binary install of Python 2.7 on SUSE Linux Enterprise Server 11?

My SLES11 box came with Python 2.6 installed. I would like to upgrade to 2.7. What is the easiest way to do this?
4
votes
0answers
194 views

Enable sqlite FTS Enhanced Query Syntax in python in RHEL6?

SQLite's full text search engine offers a simple query syntax (with AND and OR operators and -term for negation), as well as an enhanced query syntax which also allows parenthesis and NEAR — as well ...
3
votes
2answers
278 views

Why do I receive a “/bin/bash cannot find command” error for an alias?

I am using multiple python, I alias python3 to py: alias py="/opt/python3.4/bin/python3" I want to run python in vim so I write this: map <F9> :call SpecialCompileRun()<CR> func! ...
3
votes
5answers
9k views

parse json using python

I have a JSON file members.json as below. { "took": 670, "timed_out": false, "_shards": { "total": 8, "successful": 8, "failed": 0 }, "hits": { "total": 74, ...
3
votes
3answers
3k views

Delete XML node containing certain element

I want to remove all Placemarks from a KML file that contain the element <tessellate>. The following block should be wholly removed: <Placemark> ...
3
votes
2answers
377 views

Python-friendly machine configuration management systems

Are there machine configuration management systems akin to: Puppet Chef which are natively, or at least intimately, Python-friendly? Any recommendations with supporting evidence and/or backing ...
3
votes
2answers
2k views

How to test UPSTART feature of ubuntu to see my script gets restarted automatically if it gets killed?

I am running my Python script using upstart feature of Ubuntu so that if for whatever reason my Python script dies or gets killed, it can be restarted automatically. So I decided to use UPSTART ...
3
votes
3answers
418 views

Is there an equivalent of calling the built-in python function help('topics') but in bash?

I would like to explore man pages in bash using something similar to the python help('topics') function. Does this exist in bash? I know the bash equivalent of python's help('modules') would look ...
3
votes
3answers
862 views

Why does installing python-minimal package also grab the python package on Debian?

From running: apt-cache depends python2.6-minimal | grep Depends and apt-cache depends python2.6 | grep Depends it looks like python2.6 depends on python2.6-minimal and a lot more. However, ...
3
votes
4answers
485 views

Align a hex text file at 9 bytes each line

I want to align the selected portion of a text file at 9 bytes each column. For example suppose my text file looks like below. 00 2f c6 b8 29 fd 02 37 11 00 9f 74 34 0b 60 72 38 20 00 9e 61 33 8e ...
3
votes
2answers
2k views

Unable to pass a bash variable as a python argument in bash

For some reason I cannot pass the bash variable $FOLDER as a python argument on the following code. The python script downloads some files from amazon s3. Bash script: #!/bin/bash FOLDER=$(./aws get ...
3
votes
1answer
1k views

Convert xml subtitle file to srt format

I have a xml subtitle that looks like this: <?xml version="1.0" encoding="utf-8" ?><transcript> <Item from="1.16" duration="4.68"><![CDATA[(Dong-hyuk is coming to see you now.) ...
3
votes
2answers
286 views

how to execute a bash command in a python script

How can I launch a bash command with multiple args (for example "sudo apt update") from a python script?
3
votes
3answers
852 views

Unable to run python script - Permission Denied

Trying to run a NZBGet (Python) Script, I've tried to run manually with: /mnt/local/ext001/MEDIA/NZBGet/scripts/videosort/VideoSort.py but this results in: bash: ...
3
votes
5answers
1k views

Listing directories based on size from largest to smallest on single line

I can use the following command to get a list of directories and their sizes and sort them from largest to smallest (in the example I renamed the directories to numbers to make this easier to ...
3
votes
1answer
461 views

Missing Python.h in Arch

I use Arch Linux. I want to compile a C++ file that includes <Python.h>. But I can't do it. In Debian based systems this problem is resolved with sudo apt-get install python-dev. How I can ...
3
votes
2answers
420 views

Print row contain maximum and minimum value

I need to read the file (contains 16K rows)and print the entire row if any of columns and all columns contains max value (100) and all columns contain min value (0).The ouput example is given ...
3
votes
3answers
404 views

Why can't I call this program using its full path?

I am trying to build a command line wrapper in Python 3 for an exiting command line tool called spooky and I am having a hard time understanding some strange behavior. If I type spooky on the command ...
3
votes
2answers
167 views

Basic steps to develop python API in Unix environment

I am developing an API in Unix environment for virtual machines. Most of the modules are developed in python. I have few questions on this. I have the file extension as abc.py. I would like to make ...
3
votes
2answers
3k views

How to install meld 3.11 in Ubuntu 14.04?

I am trying to get meld 3.11 to work on ubuntu 14.04 I tried following the method below" cd ~ git clone https://git.gnome.org/browse/meld cd meld sudo ln -s ~/meld/bin/meld /usr/bin/meld But ...
3
votes
2answers
259 views

Rescue value from second last line

After I run a script, I've got the following lines: PyMOL(TM) Molecular Graphics System, Version 1.4.1. Copyright (c) Schrodinger, LLC. All Rights Reserved. Created by Warren L. DeLano, ...
3
votes
2answers
939 views

Clearing/modifying previous libnotify notifications?

I have written a script which generates notifications like this: notify-send -i audio-card "Transferring audio playback to speakers." \ "Audio playback has been transferred to the analog output ...
3
votes
2answers
766 views

case sensitive substitution; same target ids

I am struggled myself to make a case sensitive replacement in a text file. Please find below a segment of my sed file that I am running as sed -f file.sed < input.txt > output.txt ...
3
votes
1answer
128 views

Count and merge consecutive patterns

I'm searching for a short snippet to find, count and merge consecutive duplicates using standard tools or a common scripting language. Say our input is: 1 2 2 2 7 22 a b b c c c c c d dd 2 2 c c ...
3
votes
1answer
327 views

When I am in VirtualEnv and do apt-get install, is there any difference?

If I have a virtualenv activated when I do something like sudo apt-get install python2.7-dev should I expect different results than if I did it outside the virtual env? Limited theory says no, ...
3
votes
1answer
121 views

Issues with Skyperious

I am trying to install Skyperious on Ubuntu 13.10, I have installed all the required dependencies, my python version is Python 2.7.5+. When I run the following code from terminal python main.py ...
3
votes
1answer
87 views

Grepping a variable

I've written a simple init script to start and stop a Python script as a service. I have to be explicit about the version of Python I'm running, because this is on a CentOS 5 box with Python 2.4 & ...
3
votes
2answers
37 views

How to locally install .deb without apt-get, dpkg or root access?

I'm using python on a Linux cluster (without root access) and want to use the numpy module. After downloading numpy from Numerical Python, extracting and trying to install it with: python setup.py ...
3
votes
2answers
405 views

Why can't I load modules while executing my bash script, but only when sourcing it?

I am using modules to control the packages on my system and I have python/2.7.2 installed as a module. I have simple python executable python_exe.py which I am going to call from a simple 'driving' ...
3
votes
1answer
402 views

Output of a python script running as unit is out of order while shells seems unnafected

How would I get all outputs of systemd managed python2 script instantly into journal, just like it appears in terminal I'm on centos 7, but seems to be same on arch according to systemd manual, ...