我们从Python开源项目中，提取了以下7个代码示例，用于说明如何使用jinja2.nodes.ContextReference()。
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(self, parser): lineno = next(parser.stream).lineno # get the context context = nodes.ContextReference() # get the arguments args = [context] try: while True: args.append(parser.parse_expression()) except TemplateSyntaxError: pass # no more arguments # get the tag_name for use in looking up callable self.active_tag = parser._tag_stack[-1] # create the node node = self.call_method('_invoke_tag', args=args, lineno=lineno) return nodes.Output( [node], lineno=lineno )
def parse(self, parser): return nodes.Output([self.call_method('_dump', [ nodes.EnvironmentAttribute('sandboxed'), self.attr('ext_attr'), nodes.ImportedName(__name__ + '.importable_object'), nodes.ContextReference() ])]).set_lineno(next(parser.stream).lineno)
