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Jakub M.
Jakub M.

Reputation: 33827

Pass simple numpy array to C via SWIG

I want to pass numpy array of known size and type via SWIG to C function

# .py
data = numpy.arange( N , dtype=numpy.int32 )
external_c_function( data )

# .i
extern void external_c_function( int32_t* data );

# .c
void external_c_function( int32_t* data)
{
    // ...
}

Unfortunately, I will get an error:

TypeError: in method 'external_c_function', argument 1 of type 'int32_t *'

What is the easiest way to pass numpy array to SWIG?

Upvotes: 3

Views: 1947

Answers (1)

Pim Schellart
Pim Schellart

Reputation: 735

You can use numpy.i. Just have a look at http://www.scipy.org/Cookbook/SWIG_NumPy_examples

Upvotes: 1

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