from time import time


def timer(func):
    """
    Shows the execution time of the function object passed.
    """
    def wrap_func(*args, **kwargs):
        start = time()
        result = func(*args, **kwargs)
        end = time()
        print(
            f"Function {func.__name__!r} executed in {(end-start): .4f} seconds")
        return result
    return wrap_func