calculate mean on python

1>>> import statistics
2
3>>> statistics.mode([4, 1, 2, 2, 3, 5])
42
5
6>>> statistics.mode([4, 1, 2, 2, 3, 5, 4])
74
8
9>>> statistics.mode(["few", "few", "many", "some", "many"])
10'few'

1def calculate_mean(n):
2    s = sum(n)
3    N = len(n)
4    
5    mean = s / N
6    
7    return mean