var_tag.py 文件源码

def render(self, context):
        try:
            resolved_var = template.resolve_variable(
                self.var_to_resolve, context
            )
            self.get_context(context)[self.var_name] = resolved_var
        except template.VariableDoesNotExist:
            self.get_context(context)[self.var_name] = ""
        return ""