How to Build a Parameterized Python Decorator that Monitors Execution Time

During a job interview, a Python learner was asked to design a decorator that accepts an integer parameter representing a maximum allowed execution time, can be applied to any function, and prints the function name and actual duration when the execution exceeds the limit.

The solution uses a higher‑order function (or a callable class) together with the time module to record the start time, invoke the original function, compute the elapsed time, and compare it with the supplied threshold.

from functools import wraps
import time

class TakeTime:
    def __init__(self, para: int):
        self.para = para
    def __call__(self, func):
        @wraps(func)
        def wrapped(*args, **kwargs):
            start_time = time.time()
            name = func.__name__
            func(*args, **kwargs)
            count_time = time.time() - start_time
            if self.para >= count_time:
                print("the {name} take {time}, less time".format(name=name, time=count_time))
            else:
                print("the {name} take {time}, more time".format(name=name, time=count_time))
            return func
        return wrapped

def func_time(para: int):
    def decorator(func):
        @wraps(func)
        def wrapper(*args, **kwargs):
            start_time = time.time()
            name = func.__name__
            func(*args, **kwargs)
            count_time = time.time() - start_time
            if para >= count_time:
                print("the {name} take {time}, less time".format(name=name, time=count_time))
            else:
                print("the {name} take {time}, more time".format(name=name, time=count_time))
            return func
        return wrapper
    return decorator

@TakeTime(10)
def log():
    for x in range(10):
        time.sleep(0.5)

@func_time(10)
def log1():
    for x in range(10):
        time.sleep(0.5)

Running the example produces output such as:

the log take 5.030340194702148, less time
<function log at 0x...>