Deserializes string to date.

    :param string: str.
    :type string: str
    :return: date.
    :rtype: date

def deserialize_date(string):
    """
    Deserializes string to date.

    :param string: str.
    :type string: str
    :return: date.
    :rtype: date
    """
    try:
        from dateutil.parser import parse
        return parse(string).date()
    except ImportError:
        return string