What are the forms of defining variable parameters in Python?

Instructions

1. Add * before the formal parameters in the format of *args.

This means creating an empty tuple named args, which can accept any external non-keyword arguments passed in. Ordinary arguments must be passed as non-keyword arguments, otherwise the Python interpreter will preferentially pass all arguments to variadic arguments.

2. **kwargs means creating an empty dictionary named kwargs, which can accept any number of actual parameters assigned with keyword parameters.

Examples

def calc(*numbers):
    sum = 0
    for n in numbers:
        sum = sum + n
    return sum
 
print(calc(10, 9))

What are the advantages of Python

1. Simple and easy to use, compared with traditional languages ​​such as C/C, Java, and C# , Python’s requirements for code format are not so strict;

2. Python is open source, everyone can see the source code, and can be transplanted and used on many platforms;

3 , Python is object-oriented and can support process-oriented programming and object-oriented programming;

4. Python is an interpreted language. Programs written in Python do not need to be compiled into binary code and can be run directly from source code. Program;

5. Python is powerful and has many modules, which can basically realize all common functions.

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