Python decorator

decorator.py

import time

from functools import wraps

# Use this function only if you need decorator parameters
def howmuchtime(limit=None):
    def decorator(func):
        @wraps(func)
        def wrapper(*args, **kwargs):
            start = time.time()
            res = func(*args, **kwargs)
            total = time.time() - start
            if limit is not None and total >= limit:
                print(total)
            return res
        return wrapper
    return decorator

@howmuchtime(0)
def hello():
    print("hello world")
    
hello()