Tag Archives: python

Intro to Blather: Speech Recognition for Linux

Posted on January 16, 2014 by janpenguin
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sympy – continuity test of functions

Posted on January 13, 2014 by janpenguin

All functions I used here from Chapter 1 Exercises on Calculus and Analytic Geometry (9th Edition) by George B. Thomas, Ross L. Finney. It has discontinuity at 2 of x. Smooth graph of a function means it has continuity in … Continue reading →

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sympy plot function examples

Posted on January 11, 2014 by janpenguin

Running environment is IPython Notebook in Debian Wheezy.

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IPython notebook installation in Debian Wheezy

Posted on January 8, 2014 by janpenguin

$ sudo apt-get install ipython-notebook python-matplotlib Reading package lists… Done Building dependency tree Reading state information… Done python-matplotlib is already the newest version. python-matplotlib set to manually installed. The following extra packages will be installed: ipython-notebook-common libjs-mathjax libpgm-5.1-0 libzmq1 python-mysqldb … Continue reading →

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Some notes about parallel computing in Python

Posted on November 4, 2013 by janpenguin

I spent two days to study parallel computing by using Python’s multiprocessing module. My Debian box has AMD 6-core 64bit processor. Python version is 2.7.5. Interesting things I’ve found so far is using the multiprocessing module does produce 3 to … Continue reading →

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IPython and matplotlib

Posted on December 17, 2012 by janpenguin

OS: Debian Wheezy The explanation is here. $ ipython -pylab WARNING: `-pylab` flag has been deprecated. Use `–pylab` instead, or `–pylab=foo` to specify a backend.Python 2.7.3 (default, Sep 9 2012, 17:41:34) Type “copyright”, “credits” or “license” for more information. IPython … Continue reading →

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VPython segmentation fault error after Wheezy upgrade

Posted on December 16, 2012 by janpenguin

My Linux workstation uses fglrx graphic driver for Xorg. I experienced ‘Segmentation fault’ run-time error when I ran VPython codes today afternoon. In Squeeze it worked fine. Hmm… I forgot the old box was using open-source Radeon driver in Squeeze. … Continue reading →

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Python resources

Posted on November 1, 2012 by janpenguin

The author of The Python Standard Library By Example Doug Hellmann’s website has Python Module of the Week. It has many examples how to use standard modules. http://www.doughellmann.com/PyMOTW/about.html Working with Python subprocess – Shells, Processes, Streams, Pipes, Redirects and More … Continue reading →

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IOError: [Errno 32] Broken pipe

Posted on October 9, 2012 by janpenguin

Python version I use is 2.7.3 in Debian Wheezy. The subprocess example code from here creates annoying error: Traceback (most recent call last): File “process_example4.py”, line 8, in sys.stdout.flush() IOError: [Errno 32] Broken pipe process_example4.py import sys while True: input … Continue reading →

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Bash – Turning on and off wildcard expansion

Posted on October 8, 2012 by janpenguin

I’m dealing with the same problem for a small python script that uses ‘ls’ as sub process. How to prevent wildcard expansion in bash? $ set -f $ /path/to/globme.sh $ set+f $ YourFirstArgument YourSecondArgument … For detail, follow this link. … Continue reading →

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