[change text to unicode, compat python2 or python3]

text_handle.py

import sys

PY2 = sys.version_info[0] == 2
if not PY2:
    # Python 3.x and up
    text_type = str
    string_types = (str,)

    def as_text(v):
        if v is None:
            return None
        elif isinstance(v, bytes):
            return v.decode('utf-8')
        elif isinstance(v, str):
            return v
        else:
            raise ValueError('Unknown type %r' % type(v))

else:
    # Python 2.x
    def text_type(v):
        try:
            return unicode(v)  # noqa
        except Exception:
            return unicode(v, "utf-8", errors="ignore")  # noqa

    string_types = (str, unicode)  # noqa

    def as_text(v):
        if v is None:
            return None
        elif isinstance(v, str):
            return v.decode('utf-8')
        elif isinstance(v, unicode):  # noqa
            return v
        else:
            raise Exception("Input cannot be decoded into literal thing.")