Python – Run wxPython on Lion

osx-lionpythonwxpython

I've just bought a new computer with Lion on it. I've downloaded and installed both Python 2.7 and wxPython 2.8 (for 2.7). I know Python comes with the system, but I rather go with the official one.

Anyway, upon typing "import wx" on the IDLE, I get the following message:

Traceback (most recent call last):
File "", line 1, in
import wx
File "/usr/local/lib/wxPython-unicode-2.8.12.1/lib/python2.7/site-packages/wx-2.8-mac-unicode/wx/init.py", line 45, in
from wx._core import *
File "/usr/local/lib/wxPython-unicode-2.8.12.1/lib/python2.7/site-packages/wx-2.8-mac-unicode/wx/_core.py", line 4, in
import core
ImportError: dlopen(/usr/local/lib/wxPython-unicode-2.8.12.1/lib/python2.7/site-packages/wx-2.8-mac-unicode/wx/core.so, 2): no suitable image found. Did find:
/usr/local/lib/wxPython-unicode-2.8.12.1/lib/python2.7/site-packages/wx-2.8-mac-unicode/wx/core.so: no matching architecture in universal wrapper

I believe it happens because wxPython only supports 32-bit, but I can't figure out how to force python to run on 32-bit.

Anyone could help?
Thank you in advance.

Best Answer

wxPython 2.9 supports 64-bit on Mac too (see the Development version section and look for the cocoa build: http://wxpython.org/download.php). This was also discussed on the mailing list, and multiple users confirmed that wx works on Lion: https://groups.google.com/forum/#!searchin/wxpython-users/lion/wxpython-users/LvjSVqqMMpQ/U0QJXEeBpLQJ

Related Solutions

Python – Import error ft2font from matplotlib (python, macosx)

I ran into the same issue. Even after running make.osx, it still complained about _FT_Attach_File being undefined when I imported ft2font from matplotlib. Here's how I tracked down the problem. Hopefully, it will help someone else.

Running otool -L ft2font.so yielded:

    ft2font.so:
/Users/jbenuck/mpl_build/lib/libz.1.dylib (compatibility version 1.0.0, current version 1.2.5)
/usr/lib/libstdc++.6.dylib (compatibility version 7.0.0, current version 52.0.0)
/usr/lib/libSystem.B.dylib (compatibility version 1.0.0, current version 159.1.0)

Note the absence of any mention of libfreetype! How is ft2font.so supposed to locate the symbol if it isn't linked against it?

My next step was to capture the commands used during the build:

    make -f make.osx PREFIX=/usr/local clean fetch deps mpl_build > output.txt

Searching this yielded the command that was used to compile the offending python module. I changed the value of the output file to be one in my local directory and ran it:

/Developer/usr/bin/llvm-g++-4.2 -bundle -undefined dynamic_lookup -isysroot / -L/opt/local/lib -arch i386 -arch x86_64 -L/usr/local/lib -syslibroot,/Developer/SDKs/MacOSX10.7.sdk -arch i386 -arch x86_64 -I/usr/local/include -I/usr/local/include/freetype2 -isysroot /Developer/SDKs/MacOSX10.7.sdk build/temp.macosx-10.7-x86_64-2.7/src/ft2font.o build/temp.macosx-10.7-x86_64-2.7/src/mplutils.o build/temp.macosx-10.7-x86_64-2.7/CXX/cxx_extensions.o build/temp.macosx-10.7-x86_64-2.7/CXX/cxxsupport.o build/temp.macosx-10.7-x86_64-2.7/CXX/IndirectPythonInterface.o build/temp.macosx-10.7-x86_64-2.7/CXX/cxxextensions.o -L/usr/local/lib -L/usr/local/lib -L/usr/lib -L/usr/X11/lib -lfreetype -lz -lstdc++ -lm -o ft2font.so

ld: warning: ignoring file /opt/local/lib/libfreetype.dylib, file was built for unsupported file format which is not the architecture being linked (x86_64)

Bingo! Problem found. I know I have both macports and homebrew installed. Apparently, one of them has a version of libfreetype in /opt/local/lib that isn't compiled for 64-bit.

I reran the command with "-L /opt/local/lib" removed which worked without a warning. Copying the resulting ft2font.so into my existing matplotlib installation now allows me to successfully import ft2font from matplotlib.

DLL load failed: 1% is not valid win32 application

As mentioned by the other fellow, make sure you have a 64-bit Python AND a 64-bit wxPython version downloaded. If one or the other is 32-bit, it won't work. Personally, I have never had any problems installing wxPython on Windows.

Best Answer

Related Solutions

Python – Import error ft2font from matplotlib (python, macosx)

DLL load failed: 1% is not valid win32 application

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