

In [4]:

    
from IPython.display import display_pretty

Data types

bool_ Boolean (True or False) stored as a byte
int_ Default integer type (same as C long; normally either int64 or int32)
intc Identical to C int (normally int32 or int64)
intp Integer used for indexing (same as C ssize_t; normally either int32 or int64)
int8 Byte (-128 to 127)
int16 Integer (-32768 to 32767)
int32 Integer (-2147483648 to 2147483647)
int64 Integer (-9223372036854775808 to 9223372036854775807)
uint8 Unsigned integer (0 to 255)
uint16 Unsigned integer (0 to 65535)
uint32 Unsigned integer (0 to 4294967295)
uint64 Unsigned integer (0 to 18446744073709551615)
float_ Shorthand for float64.
float16 Half precision float: sign bit, 5 bits exponent, 10 bits mantissa
float32 Single precision float: sign bit, 8 bits exponent, 23 bits mantissa
float64 Double precision float: sign bit, 11 bits exponent, 52 bits mantissa
complex_ Shorthand for complex128.
complex64 Complex number, represented by two 32-bit floats (real and imaginary components)
complex128 Complex number, represented by two 64-bit floats (real and imaginary components)



In [5]:

    
import numpy as np
a = np.float32(1.)
b = np.int_([1,2,3.1])
c = np.arange(1, 10, dtype=np.uint8)
d = a.astype(np.uint16)
display_pretty(a, b, c, d, d.dtype)









    





1.0






    





array([1, 2, 3])






    





array([1, 2, 3, 4, 5, 6, 7, 8, 9], dtype=uint8)






    





1






    





dtype('uint16')