how to leave some parameters in python and let the value be anything

#With Function
def player_run():
#with class
class User:

Here is what the above code is Doing:
1. Defining a function named player_run.
2. Defining a class named User.
3. Creating an instance of the User class.
4. Calling the player_run function.
5. Printing the return value of the player_run function.