Array-checking restype/argtypes.

An ndpointer instance is used to describe an ndarray in restypes
and argtypes specifications.  This approach is more flexible than
using, for example,

POINTER(c_double)

since several restrictions can be specified, which are verified
upon calling the ctypes function.  These include data type
(dtype), number of dimensions (ndim), shape and flags (e.g.
'C_CONTIGUOUS' or 'F_CONTIGUOUS').  If a given array does not satisfy the
specified restrictions, a TypeError is raised.

Example:

    clib.somefunc.argtypes = [ndpointer(dtype=float64,
                                        ndim=1,
                                        flags='C_CONTIGUOUS')]
    clib.somefunc(array([1,2,3],dtype=float64))

Variables Details

[hide private]

_flagdict

Value:

{'A': 256,
 'ALIGNED': 256,
 'C': 1,
 'CONTIGUOUS': 1,
 'C_CONTIGUOUS': 1,
 'F': 2,
 'FORTRAN': 2,
 'F_CONTIGUOUS': 2,
...

_flagnames

Value:

['C_CONTIGUOUS',
 'F_CONTIGUOUS',
 'ALIGNED',
 'WRITEABLE',
 'OWNDATA',
 'UPDATEIFCOPY']