How to use the uncompyle6.parsers.parse22.Python22Parser function in uncompyle6

elif version == 1.6:
                import uncompyle6.parsers.parse16 as parse16
                if compile_mode == 'exec':
                    p = parse16.Python16Parser(debug_parser)
                else:
                    p = parse16.Python16ParserSingle(debug_parser)
            elif version == 2.1:
                import uncompyle6.parsers.parse21 as parse21
                if compile_mode == 'exec':
                    p = parse21.Python21Parser(debug_parser)
                else:
                    p = parse21.Python21ParserSingle(debug_parser)
        elif version == 2.2:
            import uncompyle6.parsers.parse22 as parse22
            if compile_mode == 'exec':
                p = parse22.Python22Parser(debug_parser)
            else:
                p = parse22.Python22ParserSingle(debug_parser)
        elif version == 2.3:
            import uncompyle6.parsers.parse23 as parse23
            if compile_mode == 'exec':
                p = parse23.Python23Parser(debug_parser)
            else:
                p = parse23.Python23ParserSingle(debug_parser)
        elif version == 2.4:
            import uncompyle6.parsers.parse24 as parse24
            if compile_mode == 'exec':
                p = parse24.Python24Parser(debug_parser)
            else:
                p = parse24.Python24ParserSingle(debug_parser)
        elif version == 2.5:
            import uncompyle6.parsers.parse25 as parse25

def __init__(self, debug_parser=PARSER_DEFAULT_DEBUG):
        super(Python22Parser, self).__init__(debug_parser)
        self.customized = {}

def __init__(self, debug_parser=PARSER_DEFAULT_DEBUG):
        super(Python22Parser, self).__init__(debug_parser)
        self.customized = {}

def customize_grammar_rules(self, tokens, customize):
        super(Python22Parser, self).customize_grammar_rules(tokens, customize)
        self.remove_rules("""
        kvlist ::= kvlist kv2
        """)

returns
                        POP_BLOCK COME_FROM
        for         ::= SETUP_LOOP expr for_iter store
                        l_stmts_opt _jump_back
                        POP_BLOCK COME_FROM

        expr        ::= conditional
        conditional ::= expr jmp_false expr JUMP_ABSOLUTE expr
        """

    def p_import21(self, args):
        '''
        alias ::= IMPORT_NAME_CONT store
        '''

class Python21ParserSingle(Python22Parser, PythonParserSingle):
    pass

if __name__ == '__main__':
    # Check grammar
    p = Python21Parser()
    p.check_grammar()
    p.dump_grammar()

#  Copyright (c) 2016-2017 Rocky Bernstein
#  Copyright (c) 2000-2002 by hartmut Goebel 

from spark_parser import DEFAULT_DEBUG as PARSER_DEFAULT_DEBUG
from uncompyle6.parser import PythonParserSingle
from uncompyle6.parsers.parse22 import Python22Parser

class Python21Parser(Python22Parser):

    def __init__(self, debug_parser=PARSER_DEFAULT_DEBUG):
        super(Python22Parser, self).__init__(debug_parser)
        self.customized = {}

    def p_forstmt21(self, args):
        """
        for         ::= SETUP_LOOP expr for_iter store
                        returns
                        POP_BLOCK COME_FROM
        for         ::= SETUP_LOOP expr for_iter store
                        l_stmts_opt _jump_back
                        POP_BLOCK COME_FROM

        expr        ::= conditional
        conditional ::= expr jmp_false expr JUMP_ABSOLUTE expr

# PRINT_ITEM_CONT for PRINT_ITEM
        print_items_stmt ::= expr PRINT_ITEM_CONT print_items_opt
        '''

    def customize_grammar_rules(self, tokens, customize):
        super(Python22Parser, self).customize_grammar_rules(tokens, customize)
        self.remove_rules("""
        kvlist ::= kvlist kv2
        """)

class Python22ParserSingle(Python23Parser, PythonParserSingle):
    pass

if __name__ == '__main__':
    # Check grammar
    p = Python22Parser()
    p.check_grammar()
    p.dump_grammar()

#  Copyright (c) 2016-2017 Rocky Bernstein
#  Copyright (c) 2000-2002 by hartmut Goebel 

from spark_parser import DEFAULT_DEBUG as PARSER_DEFAULT_DEBUG
from uncompyle6.parser import PythonParserSingle
from uncompyle6.parsers.parse22 import Python22Parser

class Python21Parser(Python22Parser):

    def __init__(self, debug_parser=PARSER_DEFAULT_DEBUG):
        super(Python22Parser, self).__init__(debug_parser)
        self.customized = {}

    def p_forstmt21(self, args):
        """
        for         ::= SETUP_LOOP expr for_iter store
                        returns
                        POP_BLOCK COME_FROM
        for         ::= SETUP_LOOP expr for_iter store
                        l_stmts_opt _jump_back
                        POP_BLOCK COME_FROM

        expr        ::= conditional
        conditional ::= expr jmp_false expr JUMP_ABSOLUTE expr