python-cffi

How to include external library with python wheel package

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You can use auditwheel to inject the external libraries into the wheel: auditwheel repair: copies these external shared libraries into the wheel itself, and automatically modifies the appropriate RPATH entries such that these libraries will be picked up at runtime. This accomplishes a similar result as if the libraries had been statically linked without requiring … Read more

How to pass a Numpy array into a cffi function and how to get one back out?

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The ctypes attribute of ndarray can interact with the ctypes module, for example, ndarray.ctypes.data is the data address of the array, you can cast it to a float * pointer, and then pass the pointer to the C function. import numpy as np from cffi import FFI ffi = FFI() ffi.cdef(“void copy(float *in, float *out, … Read more

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