栈帧逃逸
直接上个题目示例 
2025 mini-L pybox
import multiprocessing
import sys
import io
import ast

class SandboxVisitor(ast.NodeVisitor):
    forbidden_attrs = {
        "__class__", "__dict__", "__bases__", "__mro__", "__subclasses__",
        "__globals__", "__code__", "__closure__", "__func__", "__self__",
        "__module__", "__import__", "__builtins__", "__base__"
    }

    def visit_Attribute(self,...