Today I struggled a bit with pylab's plot_date function and overlapping date tick labels:
After some googling, I found that matplotlib offers nice flexible date tick control and formatting. I added a date tick locator and a date formatter to the mix as follows:
import pylab
import matplotlib
import …It's possible to make Subversion ignore unversioned files, so they don't show up in the status overview and you get a better signal to noise ratio. The command line interface to add ignore rules this is however a bit clunky. First, you need to remember following command:
svn propedit svn …Parsing a subversion Id keyword is just a matter of some regular expression magic:
# use the built in regular expression library
import re
# the subversion Id keyword
svnid = '$Id: svnidparse.py 1234 2008-02-19 09:59:27Z joske $'
# bow for the mighty regular expression
svnidrep = r'^\$Id: (?P<filename>.+) (?P<revision …Howto install and use lp_solve and its Python extension module as non root on Linux?
Compile and install the lp_solve shared library:
Download lp_solve_5.5.0.10_source.tar.gz from
SourceForge
and untar so you get a directory lp_solve_5.5 with contents.
Enter …
With the python module inspect, one can inspect (not kidding) the
run-time python stack. Among other things, this makes it possible to
get the name of the current function or callers.
Handy for logging or debugging purposes. A simple script to illustrate:
import inspect
# functions
def whoami():
return inspect.stack …Quick note to self on how to get the current working directory of in a Python script, like you have pwd (print working directory) on a Linux/Unix command line:
import os
print os.getcwd()
This weekend I encountered a weird problem during programming C extension modules for Python. For some obscure reason floats from my C extension modules were formatted with a comma as separater (e.g. 123,456) instead of with the more familiar point (e.g. 123.456). Obviously some locale related …
The OpenDocument file format (aka "OASIS Open Document Format for Office Applications"), is an open and free standard for office files. It's fairly easy to read OpenDocument files in/from Python. Basicly, an OpenDocument file is just a zip archive but with another extension (".ods" spreadsheets, ".odt" for text documents …
The pickle module of python is a very handy module if you want to store and retrieve your python data structures to and from a file. Using that module you don't need to waste your time on writing your own export and import functions any more.
We will write a …