find array length in python

1# To get the length of a Python array, use 'len()'
2a = arr.array(‘d’, [1.1, 2.1, 3.1])
3len(a) # Output: 3

1a=arr.array('d', [1.1 , 2.1 ,3.1] )
2len(a)

1#new array in range 1 -> 10;
2ar = [i for i in range(1,10)]
3print(len(ar))
4# OR
5print(len([1,2,3]))
6
7

1len(my_array)