Today I learned about python decorators they are basically a way to wrap new functions form old ones to modify or extend their functionality
So for example
def greeting_new(func):
def wrapper(param):
return func(param) + "!!!"
return wrapper
# Apply the decorator to the function
@greeting_new # Decorator here
def greeting(name):
return "Hello, " + name
# At this point, Python has effectively done:
# greeting = greeting_new(greeting)The wrapper in this sense is like saving the original function greeting. Then when we call the updated function greetingits like we are doing
greeting("Alice") ->
wrapper("Alice") ->
original greeting("Alice") + "!!!" ->
Hello, Alice !!!