python - Importing extern declaration from other Cython declaration file -


i writing cython extension use in python.

i have cython declaration .pxd file declares c struct defined in other c header file:

# cython definitions parameters.h cdef extern "parameters.h":     ctypedef struct control_par:         int num_cams         # other struct fields....

now want same thing other header file here have use defined above: control_par c struct in cython .pxd file:

from optv cimport parameters, calibration # no error here during setup cdef extern "optv/trafo.h":     void pixel_to_metric(# other parameters...                          control_par * parameters);

during cythonizing error:

'control_par' not type identifier

like not defined @ all.

what doing wrong?

the correct way import c definitions parameters.control_par. do:

from optv.parameters cimport control_par, whatever_else_you_need

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