Snow Leopard and Python (that is OS X 10.6 and wxPython)

I'm impressed by how few "issues" I have had in switching to the new Mac I an using for most courses, running Mac OS X 10.6.4 - that's "Snow Leopard". But I got a screen-full when I called up the wx GUI in Python:

wizard:python graham$ python food

Traceback (most recent call last):

  File "food", line 1, in <module>

    import wx

  File "/var/tmp/wxWidgets/wxWidgets-13~231/2.6/DSTROOT/System/Library/Frameworks/Python.framework/Versions/2.6/Extras/lib/python/wx-2.8-mac-unicode/wx/__init__.py", line 45, in 

  File "/var/tmp/wxWidgets/wxWidgets-13~231/2.6/DSTROOT/System/Library/Frameworks/Python.framework/Versions/2.6/Extras/lib/python/wx-2.8-mac-unicode/wx/_core.py", line 4, in 

ImportError: /System/Library/Frameworks/Python.framework/Versions/2.6/Extras/lib/python/wx-2.8-mac-unicode/wx/_core_.so: no appropriate 64-bit architecture (see "man python" for running in 32-bit mode)

wizard:python graham$

That is - err - spectacular.

Analysis - Python is running 64 bit, but the wx module is compiled up for 32 bit only. For most of the time with a GUI, the 32 bit version will be perfectly adequate, and you can set up an environment variable to request that version:

wizard:python graham$ export VERSIONER_PYTHON_PREFER_32_BIT=yes

wizard:python graham$ python food

[program runs]

wizard:python graham$

Easy when when you know how!
(written 2010-07-26, updated 2010-07-30)

Associated topics are indexed as below, or enter http://melksh.am/nnnn for individual articles

Y207 - wxPython
  [903] Pieces of Python - (2006-10-23)
  [2013] wxPython - Introduction and sample - (2009-01-29)
  [2744] PyQt (Python and Qt) and wxPython - GUI comparison - (2010-04-28)
  [3081] wxPython - simple example to add GUI to a server log file analysis - (2010-12-08)
  [3086] Sizers (geometry control) in a wxPython GUI - a first example - (2010-12-15)
  [3092] wxPython geometry - BoxSizer example - (2010-12-17)
  [3139] Steering our Python courses towards wxPython, SQLite and Django - (2011-01-19)
  [4589] Principles or a GUI and their practical application using wxPthon - (2015-11-30)

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