Category Archives: Python

3D Printing a dome house

Posted on June 7, 2016 by

I’ve ported most of Geodome codes in Python 3.4.   I’ll release the program under GPLv3 license soon.  The program  requires Python 3.x and OpenSCAD.   Assembly diagram of domes

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Extracting numbers using regular expression

Posted on May 31, 2016 by

It took hours to understand how the regular expression works. I briefly explains the symbols in the codes. . any single character ? zero or one of the previous character + one or more of the previous character * zero … Continue reading →

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Build IPython for Python 3.x

Posted on December 25, 2015 by

I use IPython as SymPy interface which serves as command-line CAS (Computer Algebra System) application. It’s one of critical software I depend on whenever I study mathematics. I decided to uprade IPython for Python 3.x because I felt making Python … Continue reading →

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Starting ipython for interactive sympy

Posted on December 24, 2015 by

$ ipython –pylab Python 2.7.10+ (default, Oct 10 2015, 09:11:24) Type “copyright”, “credits” or “license” for more information. IPython 2.3.0 — An enhanced Interactive Python. ? -> Introduction and overview of IPython’s features. %quickref -> Quick reference. help -> Python’s … Continue reading →

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ztouch – create empty files

Posted on July 6, 2014 by

Out of necessity I built a simple program that create many empty files. I put few examples how to use it in the code. Below command create exactly 1,000 empty files which mimic Nikon D200’s image files. The first file … Continue reading →

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sympy – find equations for the lines that are tagent and normal to the curve at (1, 2).

Posted on February 3, 2014 by

Chapter 2 Practice Exercises, p183

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sympy – changing graph color of plot()

Posted on February 1, 2014 by

plot() handles color names for RGB color codes. SymPy document doesn’t explain it clearly or sample codes don’t exit. Here is another example.

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