如何将 python int 转换为 numpy.int64？

Question

Given a variable in python of type int , eg

z = 50
type(z) 
## outputs <class 'int'>

is there a straightforward way to convert this variable into numpy.int64 ?

It appears one would have to convert this variable into a numpy array, and then convert this into int64. That feels quite convoluted.

https://docs.scipy.org/doc/numpy-1.13.0/user/basics.types.html

Answer 1

z_as_int64 = numpy.int64(z)

It's that simple. Make sure you have a good reason, though - there are a few good reasons to do this, but most of the time, you can just use a regular int directly.

Answer 2

import numpy as np
z = 3
z = np.dtype('int64').type(z)
print(type(z))

outputs:

<class 'numpy.int64'>

But i support Juliens question in his comment.