import re


def has_special_characters(target):
    """Check whether the target strings contained a special characters or not.

    Definition of special characters
        `~!@#$%^&*()=_-+<>?:"{},./;'[]\

    :param target: test strings
    :return: True if contained or False if not
    """
    pattern = r'[`~!@#$%^&*()=_\-\+<>?:"{},./;\'\[\]\\]'
    return bool(re.search(pattern, target))