decorators_signature.py

>>> import time
... def logging_time(func):
...     """Decorator that logs time"""
...     def logger(*args, **kwargs):
...         """Function that logs time"""
...         start = time.time()
...         func(*args, **kwargs)
...         print(f"Calling {func.__name__}: {time.time() - start:.5f}")
... 
...     return logger
... 
... @logging_time
... def calculate_sum_n(n):
...     return sum(range(n))
... 
... @logging_time
... def say_hi(whom, greeting="Hello"):
...     print(f"{greeting}, {whom}!")
... 
... calculate_sum_n(100000)
... say_hi("John", greeting="Hi")
... 
Calling calculate_sum_n: 0.00187
Hi, John!
Calling say_hi: 0.00001