__init__.py 文件源码

def mutateDefault(self, node):
        for field in node._fields:
            value = getattr(node, field)
            if isinstance(value, (list, tuple)):
                for i, item in enumerate(value):
                    if isinstance(item, _ast.AST):
                        new_item = self.mutate(item)
                        if new_item is not None:
                            value[i] = new_item 
                    else:
                        pass

            elif  isinstance(value, _ast.AST):
                new_value = self.mutate(value)
                if new_value is not None:
                    setattr(node, field, new_value)

        return None