What are the roles of two project folders ?python
Answers
Answer :
Decorators:
The Python language provides a simple yet powerful syntax called ‘decorators’. A decorator is a function or a class that wraps (or decorates) a function or a method. The ‘decorated’ function or method will replace the original ‘undecorated’ function or method. Because functions are first-class objects in Python, this can be done ‘manually’, but using the @decorator syntax is clearer and thus preferred.
def foo():
# do something
def decorator(func):
# manipulate func
return func
foo = decorator(foo) # Manually decorate
@decorator
def bar():
# Do something
# bar() is decorated
This mechanism is useful for separating concerns and avoiding external unrelated logic ‘polluting’ the core logic of the function or method. A good example of a piece of functionality that is better handled with decoration is memoization or caching: you want to store the results of an expensive function in a table and use them directly instead of recomputing them when they have already been computed. This is clearly not part of the function logic.