python类Const()的实例源码

def parse_subscript(self, node):
        token = next(self.stream)
        if token.type == 'dot':
            attr_token = self.stream.current
            next(self.stream)
            if attr_token.type == 'name':
                return nodes.Getattr(node, attr_token.value, 'load',
                                     lineno=token.lineno)
            elif attr_token.type != 'integer':
                self.fail('expected name or number', attr_token.lineno)
            arg = nodes.Const(attr_token.value, lineno=attr_token.lineno)
            return nodes.Getitem(node, arg, 'load', lineno=token.lineno)
        if token.type == 'lbracket':
            args = []
            while self.stream.current.type != 'rbracket':
                if args:
                    self.stream.expect('comma')
                args.append(self.parse_subscribed())
            self.stream.expect('rbracket')
            if len(args) == 1:
                arg = args[0]
            else:
                arg = nodes.Tuple(args, 'load', lineno=token.lineno)
            return nodes.Getitem(node, arg, 'load', lineno=token.lineno)
        self.fail('expected subscript expression', self.lineno)

def parse_subscript(self, node):
        token = next(self.stream)
        if token.type == 'dot':
            attr_token = self.stream.current
            next(self.stream)
            if attr_token.type == 'name':
                return nodes.Getattr(node, attr_token.value, 'load',
                                     lineno=token.lineno)
            elif attr_token.type != 'integer':
                self.fail('expected name or number', attr_token.lineno)
            arg = nodes.Const(attr_token.value, lineno=attr_token.lineno)
            return nodes.Getitem(node, arg, 'load', lineno=token.lineno)
        if token.type == 'lbracket':
            args = []
            while self.stream.current.type != 'rbracket':
                if args:
                    self.stream.expect('comma')
                args.append(self.parse_subscribed())
            self.stream.expect('rbracket')
            if len(args) == 1:
                arg = args[0]
            else:
                arg = nodes.Tuple(args, 'load', lineno=token.lineno)
            return nodes.Getitem(node, arg, 'load', lineno=token.lineno)
        self.fail('expected subscript expression', self.lineno)

def parse_subscript(self, node):
        token = next(self.stream)
        if token.type == 'dot':
            attr_token = self.stream.current
            next(self.stream)
            if attr_token.type == 'name':
                return nodes.Getattr(node, attr_token.value, 'load',
                                     lineno=token.lineno)
            elif attr_token.type != 'integer':
                self.fail('expected name or number', attr_token.lineno)
            arg = nodes.Const(attr_token.value, lineno=attr_token.lineno)
            return nodes.Getitem(node, arg, 'load', lineno=token.lineno)
        if token.type == 'lbracket':
            args = []
            while self.stream.current.type != 'rbracket':
                if args:
                    self.stream.expect('comma')
                args.append(self.parse_subscribed())
            self.stream.expect('rbracket')
            if len(args) == 1:
                arg = args[0]
            else:
                arg = nodes.Tuple(args, 'load', lineno=token.lineno)
            return nodes.Getitem(node, arg, 'load', lineno=token.lineno)
        self.fail('expected subscript expression', self.lineno)

def parse_subscript(self, node):
        token = next(self.stream)
        if token.type == 'dot':
            attr_token = self.stream.current
            next(self.stream)
            if attr_token.type == 'name':
                return nodes.Getattr(node, attr_token.value, 'load',
                                     lineno=token.lineno)
            elif attr_token.type != 'integer':
                self.fail('expected name or number', attr_token.lineno)
            arg = nodes.Const(attr_token.value, lineno=attr_token.lineno)
            return nodes.Getitem(node, arg, 'load', lineno=token.lineno)
        if token.type == 'lbracket':
            args = []
            while self.stream.current.type != 'rbracket':
                if args:
                    self.stream.expect('comma')
                args.append(self.parse_subscribed())
            self.stream.expect('rbracket')
            if len(args) == 1:
                arg = args[0]
            else:
                arg = nodes.Tuple(args, 'load', lineno=token.lineno)
            return nodes.Getitem(node, arg, 'load', lineno=token.lineno)
        self.fail('expected subscript expression', self.lineno)

def parse_subscript(self, node):
        token = next(self.stream)
        if token.type == 'dot':
            attr_token = self.stream.current
            next(self.stream)
            if attr_token.type == 'name':
                return nodes.Getattr(node, attr_token.value, 'load',
                                     lineno=token.lineno)
            elif attr_token.type != 'integer':
                self.fail('expected name or number', attr_token.lineno)
            arg = nodes.Const(attr_token.value, lineno=attr_token.lineno)
            return nodes.Getitem(node, arg, 'load', lineno=token.lineno)
        if token.type == 'lbracket':
            args = []
            while self.stream.current.type != 'rbracket':
                if args:
                    self.stream.expect('comma')
                args.append(self.parse_subscribed())
            self.stream.expect('rbracket')
            if len(args) == 1:
                arg = args[0]
            else:
                arg = nodes.Tuple(args, 'load', lineno=token.lineno)
            return nodes.Getitem(node, arg, 'load', lineno=token.lineno)
        self.fail('expected subscript expression', self.lineno)

def parse_subscript(self, node):
        token = next(self.stream)
        if token.type == 'dot':
            attr_token = self.stream.current
            next(self.stream)
            if attr_token.type == 'name':
                return nodes.Getattr(node, attr_token.value, 'load',
                                     lineno=token.lineno)
            elif attr_token.type != 'integer':
                self.fail('expected name or number', attr_token.lineno)
            arg = nodes.Const(attr_token.value, lineno=attr_token.lineno)
            return nodes.Getitem(node, arg, 'load', lineno=token.lineno)
        if token.type == 'lbracket':
            args = []
            while self.stream.current.type != 'rbracket':
                if args:
                    self.stream.expect('comma')
                args.append(self.parse_subscribed())
            self.stream.expect('rbracket')
            if len(args) == 1:
                arg = args[0]
            else:
                arg = nodes.Tuple(args, 'load', lineno=token.lineno)
            return nodes.Getitem(node, arg, 'load', lineno=token.lineno)
        self.fail('expected subscript expression', self.lineno)

def parse_subscript(self, node):
        token = next(self.stream)
        if token.type == 'dot':
            attr_token = self.stream.current
            next(self.stream)
            if attr_token.type == 'name':
                return nodes.Getattr(node, attr_token.value, 'load',
                                     lineno=token.lineno)
            elif attr_token.type != 'integer':
                self.fail('expected name or number', attr_token.lineno)
            arg = nodes.Const(attr_token.value, lineno=attr_token.lineno)
            return nodes.Getitem(node, arg, 'load', lineno=token.lineno)
        if token.type == 'lbracket':
            args = []
            while self.stream.current.type != 'rbracket':
                if args:
                    self.stream.expect('comma')
                args.append(self.parse_subscribed())
            self.stream.expect('rbracket')
            if len(args) == 1:
                arg = args[0]
            else:
                arg = nodes.Tuple(args, 'load', lineno=token.lineno)
            return nodes.Getitem(node, arg, 'load', lineno=token.lineno)
        self.fail('expected subscript expression', self.lineno)

def parse(self, parser):
        # the first token is the token that started the tag.  In our case
        # we only listen to ``'webpack'`` so this will be a name token with
        # `webpack` as value.  We get the line number so that we can give
        # that line number to the nodes we create by hand.
        lineno = six.next(parser.stream).lineno
        ctx_ref = nodes.ContextReference()

        # Parse a single expression that is the 'bundle' or 'config:bundle'
        args = [ctx_ref, parser.parse_expression()]

        # if there is a comma, the user provided an 'extensions' arg
        if parser.stream.skip_if('comma'):
            args.append(parser.parse_expression())
        else:
            args.append(nodes.Const(None))

        # now we parse the body of the cache block up to `endwebpack` and
        # drop the needle (which would always be `endwebpack` in that case)
        body = parser.parse_statements(['name:endwebpack'], drop_needle=True)

        call_args = [nodes.Name('ASSET', 'param')]

        return nodes.CallBlock(self.call_method('_get_graph', args), call_args,
                               [], body).set_lineno(lineno)

def parse_subscript(self, node):
        token = next(self.stream)
        if token.type == 'dot':
            attr_token = self.stream.current
            next(self.stream)
            if attr_token.type == 'name':
                return nodes.Getattr(node, attr_token.value, 'load',
                                     lineno=token.lineno)
            elif attr_token.type != 'integer':
                self.fail('expected name or number', attr_token.lineno)
            arg = nodes.Const(attr_token.value, lineno=attr_token.lineno)
            return nodes.Getitem(node, arg, 'load', lineno=token.lineno)
        if token.type == 'lbracket':
            args = []
            while self.stream.current.type != 'rbracket':
                if args:
                    self.stream.expect('comma')
                args.append(self.parse_subscribed())
            self.stream.expect('rbracket')
            if len(args) == 1:
                arg = args[0]
            else:
                arg = nodes.Tuple(args, 'load', lineno=token.lineno)
            return nodes.Getitem(node, arg, 'load', lineno=token.lineno)
        self.fail('expected subscript expression', self.lineno)

def parse_subscript(self, node):
        token = next(self.stream)
        if token.type == 'dot':
            attr_token = self.stream.current
            next(self.stream)
            if attr_token.type == 'name':
                return nodes.Getattr(node, attr_token.value, 'load',
                                     lineno=token.lineno)
            elif attr_token.type != 'integer':
                self.fail('expected name or number', attr_token.lineno)
            arg = nodes.Const(attr_token.value, lineno=attr_token.lineno)
            return nodes.Getitem(node, arg, 'load', lineno=token.lineno)
        if token.type == 'lbracket':
            args = []
            while self.stream.current.type != 'rbracket':
                if args:
                    self.stream.expect('comma')
                args.append(self.parse_subscribed())
            self.stream.expect('rbracket')
            if len(args) == 1:
                arg = args[0]
            else:
                arg = nodes.Tuple(args, 'load', lineno=token.lineno)
            return nodes.Getitem(node, arg, 'load', lineno=token.lineno)
        self.fail('expected subscript expression', self.lineno)

def parse_subscript(self, node):
        token = next(self.stream)
        if token.type == 'dot':
            attr_token = self.stream.current
            next(self.stream)
            if attr_token.type == 'name':
                return nodes.Getattr(node, attr_token.value, 'load',
                                     lineno=token.lineno)
            elif attr_token.type != 'integer':
                self.fail('expected name or number', attr_token.lineno)
            arg = nodes.Const(attr_token.value, lineno=attr_token.lineno)
            return nodes.Getitem(node, arg, 'load', lineno=token.lineno)
        if token.type == 'lbracket':
            args = []
            while self.stream.current.type != 'rbracket':
                if args:
                    self.stream.expect('comma')
                args.append(self.parse_subscribed())
            self.stream.expect('rbracket')
            if len(args) == 1:
                arg = args[0]
            else:
                arg = nodes.Tuple(args, 'load', lineno=token.lineno)
            return nodes.Getitem(node, arg, 'load', lineno=token.lineno)
        self.fail('expected subscript expression', self.lineno)

def parse_subscript(self, node):
        token = next(self.stream)
        if token.type == 'dot':
            attr_token = self.stream.current
            next(self.stream)
            if attr_token.type == 'name':
                return nodes.Getattr(node, attr_token.value, 'load',
                                     lineno=token.lineno)
            elif attr_token.type != 'integer':
                self.fail('expected name or number', attr_token.lineno)
            arg = nodes.Const(attr_token.value, lineno=attr_token.lineno)
            return nodes.Getitem(node, arg, 'load', lineno=token.lineno)
        if token.type == 'lbracket':
            args = []
            while self.stream.current.type != 'rbracket':
                if args:
                    self.stream.expect('comma')
                args.append(self.parse_subscribed())
            self.stream.expect('rbracket')
            if len(args) == 1:
                arg = args[0]
            else:
                arg = nodes.Tuple(args, 'load', lineno=token.lineno)
            return nodes.Getitem(node, arg, 'load', lineno=token.lineno)
        self.fail('expected subscript expression', self.lineno)

def parse(self, parser):
        lineno = next(parser.stream).lineno

        args = [parser.parse_expression()]  # ??????,?? timeout
        if parser.stream.skip_if('comma'):
            args.append(parser.parse_expression())
        else:
            args.append(nodes.Const('%s%s' % (parser.filename, lineno)))
        vary_on = []
        while parser.stream.skip_if('comma'):
            vary_on.append(parser.parse_expression())

        if vary_on:
            args.append(nodes.List(vary_on))
        else:
            args.append(nodes.Const([]))

        body = parser.parse_statements(['name:endcache'], drop_needle=True)
        return nodes.CallBlock(self.call_method('_cache', args), [], [], body).set_lineno(lineno)

def parse(self, parser):
        stream = parser.stream
        tag = stream.next()
        # get arguments
        args = []
        kwargs = []
        while not stream.current.test_any('block_end'):
            if args or kwargs:
                stream.expect('comma')
            if stream.current.test('name') and stream.look().test('assign'):
                key = nodes.Const(stream.next().value)
                stream.skip()
                value = parser.parse_expression()
                kwargs.append(nodes.Pair(key, value, lineno=key.lineno))
            else:
                args.append(parser.parse_expression())

        def make_call_node(*kw):
            return self.call_method('_call', args=[
                nodes.List(args),
                nodes.Dict(kwargs),
            ], kwargs=kw)

        return nodes.Output([make_call_node()]).set_lineno(tag.lineno)

def parse_subscript(self, node):
        token = next(self.stream)
        if token.type == 'dot':
            attr_token = self.stream.current
            next(self.stream)
            if attr_token.type == 'name':
                return nodes.Getattr(node, attr_token.value, 'load',
                                     lineno=token.lineno)
            elif attr_token.type != 'integer':
                self.fail('expected name or number', attr_token.lineno)
            arg = nodes.Const(attr_token.value, lineno=attr_token.lineno)
            return nodes.Getitem(node, arg, 'load', lineno=token.lineno)
        if token.type == 'lbracket':
            args = []
            while self.stream.current.type != 'rbracket':
                if args:
                    self.stream.expect('comma')
                args.append(self.parse_subscribed())
            self.stream.expect('rbracket')
            if len(args) == 1:
                arg = args[0]
            else:
                arg = nodes.Tuple(args, 'load', lineno=token.lineno)
            return nodes.Getitem(node, arg, 'load', lineno=token.lineno)
        self.fail('expected subscript expression', self.lineno)

def parse_subscript(self, node):
        token = next(self.stream)
        if token.type == 'dot':
            attr_token = self.stream.current
            next(self.stream)
            if attr_token.type == 'name':
                return nodes.Getattr(node, attr_token.value, 'load',
                                     lineno=token.lineno)
            elif attr_token.type != 'integer':
                self.fail('expected name or number', attr_token.lineno)
            arg = nodes.Const(attr_token.value, lineno=attr_token.lineno)
            return nodes.Getitem(node, arg, 'load', lineno=token.lineno)
        if token.type == 'lbracket':
            args = []
            while self.stream.current.type != 'rbracket':
                if args:
                    self.stream.expect('comma')
                args.append(self.parse_subscribed())
            self.stream.expect('rbracket')
            if len(args) == 1:
                arg = args[0]
            else:
                arg = nodes.Tuple(args, 'load', lineno=token.lineno)
            return nodes.Getitem(node, arg, 'load', lineno=token.lineno)
        self.fail('expected subscript expression', self.lineno)

def parse_subscript(self, node):
        token = next(self.stream)
        if token.type == 'dot':
            attr_token = self.stream.current
            next(self.stream)
            if attr_token.type == 'name':
                return nodes.Getattr(node, attr_token.value, 'load',
                                     lineno=token.lineno)
            elif attr_token.type != 'integer':
                self.fail('expected name or number', attr_token.lineno)
            arg = nodes.Const(attr_token.value, lineno=attr_token.lineno)
            return nodes.Getitem(node, arg, 'load', lineno=token.lineno)
        if token.type == 'lbracket':
            args = []
            while self.stream.current.type != 'rbracket':
                if args:
                    self.stream.expect('comma')
                args.append(self.parse_subscribed())
            self.stream.expect('rbracket')
            if len(args) == 1:
                arg = args[0]
            else:
                arg = nodes.Tuple(args, 'load', lineno=token.lineno)
            return nodes.Getitem(node, arg, 'load', lineno=token.lineno)
        self.fail('expected subscript expression', self.lineno)

def parse_subscript(self, node):
        token = next(self.stream)
        if token.type == 'dot':
            attr_token = self.stream.current
            next(self.stream)
            if attr_token.type == 'name':
                return nodes.Getattr(node, attr_token.value, 'load',
                                     lineno=token.lineno)
            elif attr_token.type != 'integer':
                self.fail('expected name or number', attr_token.lineno)
            arg = nodes.Const(attr_token.value, lineno=attr_token.lineno)
            return nodes.Getitem(node, arg, 'load', lineno=token.lineno)
        if token.type == 'lbracket':
            args = []
            while self.stream.current.type != 'rbracket':
                if args:
                    self.stream.expect('comma')
                args.append(self.parse_subscribed())
            self.stream.expect('rbracket')
            if len(args) == 1:
                arg = args[0]
            else:
                arg = nodes.Tuple(args, 'load', lineno=token.lineno)
            return nodes.Getitem(node, arg, 'load', lineno=token.lineno)
        self.fail('expected subscript expression', self.lineno)

def parse_subscript(self, node):
        token = next(self.stream)
        if token.type == 'dot':
            attr_token = self.stream.current
            next(self.stream)
            if attr_token.type == 'name':
                return nodes.Getattr(node, attr_token.value, 'load',
                                     lineno=token.lineno)
            elif attr_token.type != 'integer':
                self.fail('expected name or number', attr_token.lineno)
            arg = nodes.Const(attr_token.value, lineno=attr_token.lineno)
            return nodes.Getitem(node, arg, 'load', lineno=token.lineno)
        if token.type == 'lbracket':
            args = []
            while self.stream.current.type != 'rbracket':
                if args:
                    self.stream.expect('comma')
                args.append(self.parse_subscribed())
            self.stream.expect('rbracket')
            if len(args) == 1:
                arg = args[0]
            else:
                arg = nodes.Tuple(args, 'load', lineno=token.lineno)
            return nodes.Getitem(node, arg, 'load', lineno=token.lineno)
        self.fail('expected subscript expression', self.lineno)

def parse_subscript(self, node):
        token = next(self.stream)
        if token.type == 'dot':
            attr_token = self.stream.current
            next(self.stream)
            if attr_token.type == 'name':
                return nodes.Getattr(node, attr_token.value, 'load',
                                     lineno=token.lineno)
            elif attr_token.type != 'integer':
                self.fail('expected name or number', attr_token.lineno)
            arg = nodes.Const(attr_token.value, lineno=attr_token.lineno)
            return nodes.Getitem(node, arg, 'load', lineno=token.lineno)
        if token.type == 'lbracket':
            args = []
            while self.stream.current.type != 'rbracket':
                if args:
                    self.stream.expect('comma')
                args.append(self.parse_subscribed())
            self.stream.expect('rbracket')
            if len(args) == 1:
                arg = args[0]
            else:
                arg = nodes.Tuple(args, 'load', lineno=token.lineno)
            return nodes.Getitem(node, arg, 'load', lineno=token.lineno)
        self.fail('expected subscript expression', self.lineno)

def parse_subscript(self, node):
        token = next(self.stream)
        if token.type == 'dot':
            attr_token = self.stream.current
            next(self.stream)
            if attr_token.type == 'name':
                return nodes.Getattr(node, attr_token.value, 'load',
                                     lineno=token.lineno)
            elif attr_token.type != 'integer':
                self.fail('expected name or number', attr_token.lineno)
            arg = nodes.Const(attr_token.value, lineno=attr_token.lineno)
            return nodes.Getitem(node, arg, 'load', lineno=token.lineno)
        if token.type == 'lbracket':
            args = []
            while self.stream.current.type != 'rbracket':
                if args:
                    self.stream.expect('comma')
                args.append(self.parse_subscribed())
            self.stream.expect('rbracket')
            if len(args) == 1:
                arg = args[0]
            else:
                arg = nodes.Tuple(args, 'load', lineno=token.lineno)
            return nodes.Getitem(node, arg, 'load', lineno=token.lineno)
        self.fail('expected subscript expression', self.lineno)

def parse_subscript(self, node):
        token = next(self.stream)
        if token.type == 'dot':
            attr_token = self.stream.current
            next(self.stream)
            if attr_token.type == 'name':
                return nodes.Getattr(node, attr_token.value, 'load',
                                     lineno=token.lineno)
            elif attr_token.type != 'integer':
                self.fail('expected name or number', attr_token.lineno)
            arg = nodes.Const(attr_token.value, lineno=attr_token.lineno)
            return nodes.Getitem(node, arg, 'load', lineno=token.lineno)
        if token.type == 'lbracket':
            args = []
            while self.stream.current.type != 'rbracket':
                if args:
                    self.stream.expect('comma')
                args.append(self.parse_subscribed())
            self.stream.expect('rbracket')
            if len(args) == 1:
                arg = args[0]
            else:
                arg = nodes.Tuple(args, 'load', lineno=token.lineno)
            return nodes.Getitem(node, arg, 'load', lineno=token.lineno)
        self.fail('expected subscript expression', self.lineno)

def parse_subscript(self, node):
        token = next(self.stream)
        if token.type == 'dot':
            attr_token = self.stream.current
            next(self.stream)
            if attr_token.type == 'name':
                return nodes.Getattr(node, attr_token.value, 'load',
                                     lineno=token.lineno)
            elif attr_token.type != 'integer':
                self.fail('expected name or number', attr_token.lineno)
            arg = nodes.Const(attr_token.value, lineno=attr_token.lineno)
            return nodes.Getitem(node, arg, 'load', lineno=token.lineno)
        if token.type == 'lbracket':
            args = []
            while self.stream.current.type != 'rbracket':
                if args:
                    self.stream.expect('comma')
                args.append(self.parse_subscribed())
            self.stream.expect('rbracket')
            if len(args) == 1:
                arg = args[0]
            else:
                arg = nodes.Tuple(args, 'load', lineno=token.lineno)
            return nodes.Getitem(node, arg, 'load', lineno=token.lineno)
        self.fail('expected subscript expression', self.lineno)

def parse_subscript(self, node):
        token = next(self.stream)
        if token.type == 'dot':
            attr_token = self.stream.current
            next(self.stream)
            if attr_token.type == 'name':
                return nodes.Getattr(node, attr_token.value, 'load',
                                     lineno=token.lineno)
            elif attr_token.type != 'integer':
                self.fail('expected name or number', attr_token.lineno)
            arg = nodes.Const(attr_token.value, lineno=attr_token.lineno)
            return nodes.Getitem(node, arg, 'load', lineno=token.lineno)
        if token.type == 'lbracket':
            args = []
            while self.stream.current.type != 'rbracket':
                if args:
                    self.stream.expect('comma')
                args.append(self.parse_subscribed())
            self.stream.expect('rbracket')
            if len(args) == 1:
                arg = args[0]
            else:
                arg = nodes.Tuple(args, 'load', lineno=token.lineno)
            return nodes.Getitem(node, arg, 'load', lineno=token.lineno)
        self.fail('expected subscript expression', self.lineno)

def parse(self, parser):
        lineno = next(parser.stream).lineno

        # get the first parameter: the view name
        args = [parser.parse_expression()]

        # if there's a comma, we've also got an instance variable here
        if parser.stream.skip_if('comma'):
            args.append(parser.parse_expression())
        else:
            # no instance supplied for URL tag
            args.append(nodes.Const(None))

        return nodes.Output(
            [self.call_method('_url', args)],
            lineno=lineno
        )

def parse(self, parser):
        lineno = next(parser.stream).lineno

        next_token = parser.stream.look()
        # if there are parameters
        if next_token.type == "comma":
            args = [parser.parse_expression()]
            if parser.stream.skip_if('comma'):
                args.append(parser.parse_expression())
            else:
                raise TemplateSyntaxError("Missing Lorem Ipsum generator parameter: kind", lineno)

            if args[1].value not in self.GENERATORS:
                raise TemplateSyntaxError(
                    "Supported Lorem Ipsum generator kinds are: %s" % ", ".join(self.GENERATORS.keys()),
                    lineno
                )
        else:
            # if no parameters were supplied
            args = [nodes.Const(1), nodes.Const("paragraphs")]

        return nodes.Output(
            [self.call_method("_lipsum", args)],
            lineno=lineno
        )

def parse_subscript(self, node):
        token = next(self.stream)
        if token.type == 'dot':
            attr_token = self.stream.current
            next(self.stream)
            if attr_token.type == 'name':
                return nodes.Getattr(node, attr_token.value, 'load',
                                     lineno=token.lineno)
            elif attr_token.type != 'integer':
                self.fail('expected name or number', attr_token.lineno)
            arg = nodes.Const(attr_token.value, lineno=attr_token.lineno)
            return nodes.Getitem(node, arg, 'load', lineno=token.lineno)
        if token.type == 'lbracket':
            args = []
            while self.stream.current.type != 'rbracket':
                if args:
                    self.stream.expect('comma')
                args.append(self.parse_subscribed())
            self.stream.expect('rbracket')
            if len(args) == 1:
                arg = args[0]
            else:
                arg = nodes.Tuple(args, 'load', lineno=token.lineno)
            return nodes.Getitem(node, arg, 'load', lineno=token.lineno)
        self.fail('expected subscript expression', self.lineno)

def parse_subscript(self, node):
        token = next(self.stream)
        if token.type == 'dot':
            attr_token = self.stream.current
            next(self.stream)
            if attr_token.type == 'name':
                return nodes.Getattr(node, attr_token.value, 'load',
                                     lineno=token.lineno)
            elif attr_token.type != 'integer':
                self.fail('expected name or number', attr_token.lineno)
            arg = nodes.Const(attr_token.value, lineno=attr_token.lineno)
            return nodes.Getitem(node, arg, 'load', lineno=token.lineno)
        if token.type == 'lbracket':
            args = []
            while self.stream.current.type != 'rbracket':
                if args:
                    self.stream.expect('comma')
                args.append(self.parse_subscribed())
            self.stream.expect('rbracket')
            if len(args) == 1:
                arg = args[0]
            else:
                arg = nodes.Tuple(args, 'load', lineno=token.lineno)
            return nodes.Getitem(node, arg, 'load', lineno=token.lineno)
        self.fail('expected subscript expression', self.lineno)

def parse_subscript(self, node):
        token = next(self.stream)
        if token.type == 'dot':
            attr_token = self.stream.current
            next(self.stream)
            if attr_token.type == 'name':
                return nodes.Getattr(node, attr_token.value, 'load',
                                     lineno=token.lineno)
            elif attr_token.type != 'integer':
                self.fail('expected name or number', attr_token.lineno)
            arg = nodes.Const(attr_token.value, lineno=attr_token.lineno)
            return nodes.Getitem(node, arg, 'load', lineno=token.lineno)
        if token.type == 'lbracket':
            args = []
            while self.stream.current.type != 'rbracket':
                if args:
                    self.stream.expect('comma')
                args.append(self.parse_subscribed())
            self.stream.expect('rbracket')
            if len(args) == 1:
                arg = args[0]
            else:
                arg = nodes.Tuple(args, 'load', lineno=token.lineno)
            return nodes.Getitem(node, arg, 'load', lineno=token.lineno)
        self.fail('expected subscript expression', self.lineno)

def parse_compare(self):
        token = self.stream.current
        if token.type == 'name':
            if token.value in ('true', 'false', 'True', 'False'):
                node = nodes.Const(token.value in ('true', 'True'),
                                   lineno=token.lineno)
            elif token.value in ('none', 'None'):
                node = nodes.Const(None, lineno=token.lineno)
            else:
                node = nodes.Name(token.value, 'load', lineno=token.lineno)
            next(self.stream)
        elif token.type == 'lparen':
            next(self.stream)
            node = self.parse_expression()
            self.stream.expect('rparen')
        else:
            self.fail("unexpected token '%s'" % (token,), token.lineno)
        return node