:Description: Convert javascript value to python value by type.
        :param value: Value to transform.
        :type value: None, bool, int, float, string
        :return: None, bool, int, float, string

def __type2python(cls, value):
        """
        :Description: Convert javascript value to python value by type.
        :param value: Value to transform.
        :type value: None, bool, int, float, string
        :return: None, bool, int, float, string
        """
        if isinstance(value, string_types):
            if value is 'null':
                return None
            elif value in ('true', 'false'):
                return False if value == 'false' else True
            elif value.replace('.', '', 1).isdigit():
                return eval(value)
            elif value.startswith('{') and value.endswidth('}'):
                try:
                    return json.loads(value)
                except ValueError:
                    return value
        return value