How to use the uncompyle6.parsers.astnode.AST function in uncompyle6

def n_yield(self, node):
        self.write('yield')
        if node != AST('yield', [NONE, Token('YIELD_VALUE')]):
            self.write(' ')
            self.preorder(node[0])
        self.prune() # stop recursing

def is_return_none(self, node):
        # Is there a better way?
        ret = (node[0] == 'ret_expr'
               and node[0][0] == 'expr'
               and node[0][0][0] == 'LOAD_CONST'
               and node[0][0][0].pattr is None)
        if self.version <= 2.6:
            return ret
        else:
            # FIXME: should the AST expression be folded into
            # the global RETURN_NONE constant?
            return (ret or
                    node == AST('return_stmt',
                                [AST('ret_expr', [NONE]), Token('RETURN_VALUE')]))

def n_yield(self, node):
        start = len(self.f.getvalue())
        self.write('yield')
        if node != AST('yield', [NONE, Token('YIELD_VALUE')]):
            self.write(' ')
            node[0].parent = node
            self.preorder(node[0])
        self.set_pos_info(node[-1], start, len(self.f.getvalue()))
        self.set_pos_info(node, start, len(self.f.getvalue()))
        self.prune() # stop recursing

def n_return_stmt(self, node):
        start = len(self.f.getvalue()) + len(self.indent)
        if self.params['isLambda']:
            self.preorder(node[0])
            if hasattr(node[-1], 'offset'):
                self.set_pos_info(node[-1], start,
                len(self.f.getvalue()))
            self.prune()
        else:
            start = len(self.f.getvalue()) + len(self.indent)
            self.write(self.indent, 'return')
            if self.return_none or node != AST('return_stmt', [AST('ret_expr', [NONE]), Token('RETURN_VALUE')]):
                self.write(' ')
                self.last_finish = len(self.f.getvalue())
                self.preorder(node[0])
                if hasattr(node[-1], 'offset'):
                    self.set_pos_info(node[-1], start, len(self.f.getvalue()))
                    pass
                pass
            else:
                for n in node:
                    self.set_pos_info_recurse(n, start, len(self.f.getvalue()))
                    pass
                pass
            self.set_pos_info(node, start, len(self.f.getvalue()))
            self.println()
            self.prune() # stop recursing

pass

        try:
            if first_stmt == NAME_MODULE:
                if self.hide_internal:
                    del ast[0]
                    first_stmt = ast[0][0]
            pass
        except:
            pass

        have_qualname = False
        if self.version < 3.0:
            # Should we ditch this in favor of the "else" case?
            qualname = '.'.join(self.classes)
            QUAL_NAME = AST('stmt',
                            [ AST('assign',
                                  [ AST('expr', [Token('LOAD_CONST', pattr=qualname)]),
                                    AST('store', [ Token('STORE_NAME', pattr='__qualname__')])
                                  ])])
            have_qualname = (ast[0][0] == QUAL_NAME)
        else:
            # Python 3.4+ has constants like 'cmp_to_key..K'
            # which are not simple classes like the < 3 case.
            try:
                if (first_stmt[0] == 'assign' and
                    first_stmt[0][0][0] == 'LOAD_CONST' and
                    first_stmt[0][1] == 'store' and
                    first_stmt[0][1][0] == Token('STORE_NAME', pattr='__qualname__')):
                    have_qualname = True
            except:
                pass

try:
            if first_stmt == NAME_MODULE:
                if self.hide_internal:
                    del ast[0]
                    first_stmt = ast[0][0]
            pass
        except:
            pass

        have_qualname = False
        if self.version < 3.0:
            # Should we ditch this in favor of the "else" case?
            qualname = '.'.join(self.classes)
            QUAL_NAME = AST('stmt',
                            [ AST('assign',
                                  [ AST('expr', [Token('LOAD_CONST', pattr=qualname)]),
                                    AST('store', [ Token('STORE_NAME', pattr='__qualname__')])
                                  ])])
            have_qualname = (ast[0][0] == QUAL_NAME)
        else:
            # Python 3.4+ has constants like 'cmp_to_key..K'
            # which are not simple classes like the < 3 case.
            try:
                if (first_stmt[0] == 'assign' and
                    first_stmt[0][0][0] == 'LOAD_CONST' and
                    first_stmt[0][1] == 'store' and
                    first_stmt[0][1][0] == Token('STORE_NAME', pattr='__qualname__')):
                    have_qualname = True
            except:
                pass

if first_stmt == NAME_MODULE:
                if self.hide_internal:
                    del ast[0]
                    first_stmt = ast[0][0]
            pass
        except:
            pass

        have_qualname = False
        if self.version < 3.0:
            # Should we ditch this in favor of the "else" case?
            qualname = '.'.join(self.classes)
            QUAL_NAME = AST('stmt',
                            [ AST('assign',
                                  [ AST('expr', [Token('LOAD_CONST', pattr=qualname)]),
                                    AST('store', [ Token('STORE_NAME', pattr='__qualname__')])
                                  ])])
            have_qualname = (ast[0][0] == QUAL_NAME)
        else:
            # Python 3.4+ has constants like 'cmp_to_key..K'
            # which are not simple classes like the < 3 case.
            try:
                if (first_stmt[0] == 'assign' and
                    first_stmt[0][0][0] == 'LOAD_CONST' and
                    first_stmt[0][1] == 'store' and
                    first_stmt[0][1][0] == Token('STORE_NAME', pattr='__qualname__')):
                    have_qualname = True
            except:
                pass

        if have_qualname:
            if self.hide_internal: del ast[0]

})

        if version <= 2.4:
            TABLE_DIRECT.update({
                'importmultiple': ( '%|import %c%c\n', 2, 3),
                'import_cont'   : ( ', %c', 2),
                })
            if version == 2.3:
                TABLE_DIRECT.update({
                    'if1_stmt':	( '%|if 1\n%+%c%-', 5 )
                })

            global NAME_MODULE
            NAME_MODULE = AST('stmt',
                              [ AST('assign',
                                    [ AST('expr',
                                          [Token('LOAD_GLOBAL', pattr='__name__',
                                                 offset=0, has_arg=True)]),
                                      AST('store',
                                          [ Token('STORE_NAME', pattr='__module__',
                                                  offset=3, has_arg=True)])
                                    ])])
            pass
            if version <= 2.3:
                TABLE_DIRECT.update({
                    'tryfinallystmt': ( '%|try:\n%+%c%-%|finally:\n%+%c%-\n\n', 1, 4 )
                })
                if version <= 2.1:
                    TABLE_DIRECT.update({
                        'importmultiple': ( '%c', 2 ),
                        'imports_cont': ( '%c', 2 ),
                        # FIXME: not quite right. We have indiividual imports

'DELETE_DEREF': ( '%{pattr}', 0 ),
                })

        if version <= 2.4:
            TABLE_DIRECT.update({
                'importmultiple': ( '%|import %c%c\n', 2, 3),
                'import_cont'   : ( ', %c', 2),
                })
            if version == 2.3:
                TABLE_DIRECT.update({
                    'if1_stmt':	( '%|if 1\n%+%c%-', 5 )
                })

            global NAME_MODULE
            NAME_MODULE = AST('stmt',
                              [ AST('assign',
                                    [ AST('expr',
                                          [Token('LOAD_GLOBAL', pattr='__name__',
                                                 offset=0, has_arg=True)]),
                                      AST('store',
                                          [ Token('STORE_NAME', pattr='__module__',
                                                  offset=3, has_arg=True)])
                                    ])])
            pass
            if version <= 2.3:
                TABLE_DIRECT.update({
                    'tryfinallystmt': ( '%|try:\n%+%c%-%|finally:\n%+%c%-\n\n', 1, 4 )
                })
                if version <= 2.1:
                    TABLE_DIRECT.update({
                        'importmultiple': ( '%c', 2 ),
                        'imports_cont': ( '%c', 2 ),