def ucnstring_to_python(ucn_string):
    """
    Return string with Unicode UCN (e.g. "U+4E00") to native Python Unicode
    (u'\\u4e00').
    """
    res = re.findall("U\+[0-9a-fA-F]*", ucn_string)
    for r in res:
        ucn_string = ucn_string.replace(text_type(r), text_type(ucn_to_unicode(r)))

    ucn_string = ucn_string.encode('utf-8')

    assert isinstance(ucn_string, bytes)
    return ucn_string
Return string with Unicode UCN (e.g. "U+4E00") to native Python Unicode
    (u'\\u4e00').