def to_python(cls, value, **kwargs):
        """String deserialisation just return the value as a string"""
        if not value:
            return ''
        try:
            return str(value)
        except:
            pass
        try:
            return value.encode('utf-8')
        except:
            pass
        raise cls.exception("Cannot deserialize value {0} tostring".format(value))
String deserialisation just return the value as a string