import time


def start_time_measuring(what_to_measure=''):
    """
    Returns the start time of an operation.

    :param what_to_measure: string. What to measure. For print out.
    :return: localtime. Start time.
    """
    starttime = time.localtime()
    print('Start time', what_to_measure, ':', time.strftime('%a, %d %b %Y %H:%M:%S', starttime))
    return starttime