How to pass a numpy array of string types to a function in Cython

Question

Passing a numpy array of dtype np.float64_t works fine ( below), but I can\'t pass string arrays.

This is what works :

# c         


        

Answer 1

Looks like you're out of luck.

http://cython.readthedocs.org/en/latest/src/tutorial/numpy.html

Some data types are not yet supported, like boolean arrays and string arrays.

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This answer is no longer valid as shown by Saullo Castro's answer, but I'll leave it for historical purposes.

Answer 2

With Cython 0.20.1 it works using cdef np.ndarray, without specifying the data type and the number of dimensions:

import numpy as np
cimport numpy as np

cdef func1(np.ndarray A):
    print A

def testing():
    chunk = np.array([['huh','yea'], ['swell','ray']])
    func1(chunk)