apa itu duck typing python

1function calculate(a, b, c) => return (a+b)*c
2 
3example1 = calculate (1, 2, 3)
4example2 = calculate ([1, 2, 3], [4, 5, 6], 2)
5example3 = calculate ('apples ', 'and oranges, ', 3)
6 
7print to_string example1
8print to_string example2
9print to_string example3
10