Python - Decorator

cat << 'EOF' > main.py
#!/usr/bin/env python3

# Sample from https://blog.stoege.net/posts/python_decorator/

# Vars
a = 3
b = 8

# Decorator which logs start and end of a function
def log_function_call(func):
    def wrapper(*args, **kwargs):
        print(f"\nCalling function '{func.__name__}' with {args=} & {kwargs=}")
        result = func(*args, **kwargs)
        print(f"Function '{func.__name__}' finnished\n")
        return result
    return wrapper

@log_function_call
def add(a=int, b=int) -> int:
    result = a + b
    return result

@log_function_call
def sub(a=int, b=int) -> int:
    result = a - b
    return result

@log_function_call
def prod(a=int, b=int) -> int:
    result = a * b
    return result

@log_function_call
def div(a=int, b=int) -> int:
    result = a / b
    return result

if __name__ == "__main__":
    print("Result:", add(a, b))
    print("Result:", sub(a, b))
    print("Result:", prod(a, b))
    print("Result:", div(a, b))

EOF
chmod u+x main.py

##### RUN #####

# ./main.py

###############

user@host% ./main.py 

Calling function 'add' with args=(3, 8) & kwargs={}
Function 'add' finnished

Result: 11

Calling function 'sub' with args=(3, 8) & kwargs={}
Function 'sub' finnished

Result: -5

Calling function 'prod' with args=(3, 8) & kwargs={}
Function 'prod' finnished

Result: 24

Calling function 'div' with args=(3, 8) & kwargs={}
Function 'div' finnished

Result: 0.375