bundles / numpy latest / numpy / ctypeslib / as_ctypes_type

function

`numpy.ctypeslib:as_ctypes_type`

source: build-install/usr/lib/python3.14/site-packages/numpy/ctypeslib/_ctypeslib.py :463

Signature

def as_ctypes_type ( dtype )

Summary

Convert a dtype into a ctypes type.

Parameters

dtype : dtype: The dtype to convert

Returns

: ctype: A ctype scalar, union, array, or struct

Raises

: NotImplementedError: If the conversion is not possible

Notes

This function does not losslessly round-trip in either direction.

np.dtype(as_ctypes_type(dt)) will:

insert padding fields
reorder fields to be sorted by offset
discard field titles

as_ctypes_type(np.dtype(ctype)) will:

discard the class names of ctypes.Structures and ctypes.Unions
convert single-element ctypes.Unions into single-element ctypes.Structures
insert padding fields

Examples

Converting a simple dtype:

dt = np.dtype('int8')
ctype = np.ctypeslib.as_ctypes_type(dt)
ctype

Converting a structured dtype:

dt = np.dtype([('x', 'i4'), ('y', 'f4')])
ctype = np.ctypeslib.as_ctypes_type(dt)
ctype

Aliases

numpy.ctypeslib.as_ctypes_type

Referenced by

This package