import re


def ismultibyte(value):
    """
    Return whether or not given value contains one or more multibyte chars.
    If the value contains one or more multibyte chars, this function returns ``True``, otherwise ``False``.

    Examples::

        >>> ismultibyte('あいうえお foobar')
        True

        >>> ismultibyte('abc')
        False

    :param value: string to validate one or more multibyte chars
    """
    multi_byte = re.compile(r"[^\x00-\x7F]")
    return bool(multi_byte.match(value))