问题
I have a C++ library repeater.so that I can load from Python in Linux the following way:
import numpy as np
repeater = np.ctypeslib.load_library('librepeater.so', '.')
However, when I compile the same library on Mac OS X (Snow Leopard, 32 bit) and get repeater.dylib, and then run the following in Python:
import numpy as np
repeater = np.ctypeslib.load_library('librepeater.dylib', '.')
I get the following error:
OSError: dlopen(/mydir/librepeater.dylib, 6): no suitable image found. Did find:
/mydir/librepeater.dylib: mach-o, but wrong architecture
Do I have to do something different to load a dynamic library in Python on Mac OS X?
回答1:
Nope. As the error message says, there's an architecture mismatch between your python and librepeater.dylib file. Use file to check what the architecture of librepeater.dylib is; your python is going to be built using one of the ones not listed.
回答2:
It's not just a question of what architectures are available in the dylib; it's also a matter of which architecture the Python interpreter is running in. If you are using the Apple-supplied Python 2.6.1 in OS X 10.6, by default it runs in 64-bit mode if possible. Since you say your library was compiled as 32-bit, you'll need to force Python to run in 32-bit mode. For the Apple-supplied Python, one way to do that is to set a special environment variable:
$ python -c "import sys; print sys.maxint"
9223372036854775807
$ export VERSIONER_PYTHON_PREFER_32_BIT=yes
$ python -c "import sys; print sys.maxint"
2147483647
See Apple's man 1 python for more information.
来源：https://stackoverflow.com/questions/3481508/python-ctypes-not-loading-dynamic-library-on-mac-os-x