Function arguments often see * args and ** kwargs

In python, these two parameters is variable in python, * arg represent any number of unknown parameters, type tuple; ** kwargs represents keyword parameter of dict.

The following example code * args calculated using the incoming number n of the sum of squares, n being variable

1 def calc(*numbers):
2     sum = 0
3     for n in numbers:
4         sum = sum + n * n
5     print(sum)
6 
7 calc(1,2,3,4)

The result is output 30 runs.

The following code is the Usage Parameter ** kwargs

1 def func(**kwargs):
2     print(kwargs)
3 func(a=1, b=2)

Run results