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"""Impements commonly used types."""

import functools
import time


def timer_decorator(func):
    """Measure and print out execution time of the decorated function."""

    @functools.wraps(func)
    def wrapper(*args, **kwargs):
        t0 = time.perf_counter()
        result = func(*args, **kwargs)
        t1 = time.perf_counter()
        print(f'{func.__name__} took {t1-t0}s.')
        return result

    return wrapper