Python decorator is callable that take in a function and modify the behaviour of the function without explicitly modify the function code.
Let us the simple example below.
if i have a simple function my_func that return “hello” as shown below
def my_func(): return "hello"
I would like to modify the output of the function to uppercase “HELLO”. The easiest method is to do
However, we can also use decorator method to do this as follows:
def my_decorator(func): a = func() return a.upper() @my_decorator def my_func(): return 'hello' my_func
Thus, we are able to modify the output the my_func without modifying the my_func code. The above decorator code has the same effect as follows. So @my_decorator is equivalent to my_func = my_decorator(my_func).
def my_decorator(func): a = func() return a.upper() def my_func(): return 'hello my_func = my_decorator(my_func) print(my_func)
May 23, 2021