Data Types

Fixed-sized allases

Nnumpy types	C type	Description
np.int8	int8_t	Byte(-128 to 127)
np.int16	int16_t	integer(-32768 to 32767)
np.int32	int32_t	integer
np.int64	int64_t	None
np.uint8	uint8_t	Unsigned integer
np.uint16	uint16_t	Unsigned integer
np.uint32	uint32_t	Unsigned integer
np.uint64	uint64_t	Unsigned integer
np.intp	intptr_t	integer used for indexing
np.float32	float
np.float64/np.float_	double	the precision of the builtin python float
np.complex64	float complex	complex number
np.complex128	double complex	the precision of the builtin python complex

Primitive types

Numpy type	C type
np.bool_	bool
np.byte	signed char
np.ubyte	unsigned char
np.short	short
np.ushort	unsigned short
np.intc	int
np.uint	long
np.longlong	long long
np.single	float
np.double	double
np.longdouble	long double
np.csingle	float complex
np.cdouble	double complex
np.clongdouble	long double complex

Examples

import numpy as np
x = np.float32(1.0) 
y = np.int_([1,2,3]) 
z = np.arange(3, dtype=np.uint8)