<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def is_email(data):
 """ Check if given data string is an email. Usage:: True False :param data: Data to check. :type data: unicode :return: Is email. :rtype: bool """


    if re.match(r"[\w.%+-]+@[\w.]+\.[a-zA-Z]{2,4}", data):
        LOGGER.debug("> {0}' is matched as email.".format(data))
        return True
    else:
        LOGGER.debug("> {0}' is not matched as email.".format(data))
        return False