With that out of the way, we can talk about decorators. Decorators wrap a function in another function that modifies the original in some way, such as adding functionality, modifying arguments or results, and so on. Decorators are identified by the @foo nomenclature on the line above a function/method definition.
The workhorse of a decorator function is defining the wrapperfunction within it. In this case, the wrapperfunction is a nested function that actually does the modification work, though the decorator name is what is called.
def fun_decorator(some_funct):
def wrapper():
print("Here is the decorator, doing its thing")
for i in range(10):
print(i)
print("The decorator is done, returning to the
originally scheduled function")
print(some_funct())
return wrapper- Define the main function...