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numpy item size

#itemsize shows the length of one array element in bytes

import numpy as np
a = np.array([[1,2,3],[4,5,6]],dtype = np.int64)
a.itemsize
#output will be 8
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numpy get array size

myArray.shape # Returns the number of rows, columns etc. (depends on dimensions how many numbers you get)

print(a_1d.shape)
# (3,)

print(type(a_1d.shape))
# <class 'tuple'>

print(a_2d.shape)
# (3, 4)

print(a_3d.shape)
# (2, 3, 4)
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