Variable parameters in Python: a powerful tool for flexibly handling function parameters

In Python programming, flexibility in function parameters is very important. Python provides a special parameter type, variable parameters, which allows us to determine the number of parameters when defining a function. By using variable parameters, we can simplify the way functions are called and improve the flexibility and readability of the code. This article will introduce the use of variable parameters in Python in detail and provide corresponding source code examples.

Variable parameters in Python can be divided into two types: *args and **kwargs.

1. args: Receive any number of positional parameters.
   When defining a function, use args as a parameter to receive any number of positional parameters. Inside the function, *args will be parsed as a tuple containing all the positional arguments passed in.

Here is an example code using *args:

def add(*args):
    total = 0
    for num in args:
        total += num