Generate Numpy ones array with custom datatype

import numpy as np
a = np.ones((2, 3),dtype='float64')

import numpy as np - load lib:Numpy module for Python
np.ones - generates ones array
(2, 3) - generated array dimensions (2x3 in our case)
dtype='float64' - data type of generated array. See here for a list of data types.

group: array_generate

Example:

import numpy as np
a = np.ones((2, 3),dtype='float64')
print(a)

[[1. 1. 1.]
 [1. 1. 1.]]