3.4.2. Argument names

In this print_sum example, we used arg1 and arg2 as argument names:

def print_sum(arg1, arg2):
    print("Hi!")
    print(f"The first variable is {arg1}.")
    print(f"The second variable is {arg2}.")
    print(f"The sum of both variables is {arg1 + arg2}.")

Virtually any other name would work as well. For instance, we could use first and second, as long as we also use these names in the implementation:

def print_sum(first, second):
    print("Hi!")
    print(f"The first variable is {first}.")
    print(f"The second variable is {second}.")
    print(f"The sum of both variables is {first + second}.")

Good practice: Clear argument names

It is important to use clear names for function arguments. Argument names are selected using the same best practices as standard variable names.