Python function definition

In Python, you define a function to use the DEF statement, write the function name, the parentheses, the arguments in parentheses, the colon, and then, in the shrink block, write the function body, and the return value of the function is returned with a return statement.

Write a function

If there is no return, return none after the function has finished executing

If you have saved the function to the abstest.py file, you can import it directly using the following method

From abstest import My_num

Defining an empty function

Def NOP ():

Pass

Data type Judgment isinstance ()

Functions can also return multiple values

Python function definition