如何获取函数中使用的内置函数的列表

import inspect

def my_function():
    return len([1, 2, 3])

# 获取函数的源代码
source = inspect.getsource(my_function)
print(source)

# 使用正则表达式匹配内置函数
import re
builtin_functions = re.findall(r'\b(len|range|print)\b', source)
print(builtin_functions)

import ast

def my_function():
    return len([1, 2, 3])

# 解析源代码生成 AST
tree = ast.parse(inspect.getsource(my_function))

# 遍历 AST 找到内置函数
builtin_functions = set()
for node in ast.walk(tree):
    if isinstance(node, ast.Call) and isinstance(node.func, ast.Name):
        builtin_functions.add(node.func.id)

print(builtin_functions)