numpy.alen() is used to return the length of the first dimension of the input array.
Syntax: numpy.alen (arr)
Parameters:
arr: [array_like] Input array.Return: [int] Length of the first dimension of arr.
Code # 1:
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Output:
Input array: [[2 , 0, 7], [0, 5, 9]] Length of the first dimension of arr: 2
Code # 2:
# Python program explaining
# alen () function
import numpy as geek
# input array (1 * 3 * 3)
in_arr = geek.arange ( 9 ). reshape ( 1 , 3 , 3 )
print ( " Input array: " , in_arr)
out_dim = geek.alen (in_arr)
print ( "Length of the first dimension of arr:" , out_dim)
Exit: Input array: [[[0 1 2] [3 4 5] [6 7 8]]] Length of the first dimension of arr: 1
