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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def make_hash_id():
 """ Compute the `datetime.now` based SHA-1 hash of a string. :return: Returns the sha1 hash as a string. :rtype: str """

    today = datetime.datetime.now().strftime(DATETIME_FORMAT)
    return hashlib.sha1(today.encode('utf-8')).hexdigest()