[inspect.getsource] Why is there always an OSError?

[anzhi0708]

Whether I use an interactive environment or put the code in a file and import it, Python always complains that it cannot get the source code and throws an OSError. As an expert in black magic, please give me some advice.

from test_ast import hack_print

@hack_print
def hello():
    print("Hello World")

hello()

#test_ast.py

import ast
import inspect

def hack_print(func):
    def wrapper(*args, **kwargs):
        # 获取函数的源代码
        source = inspect.getsource(func)
        # 解析源代码成AST
        root = ast.parse(source)
        
        # 遍历AST节点，找到函数定义节点
        for node in root.body:
            if isinstance(node, ast.FunctionDef):
                # 遍历函数体节点，找到表达式节点
                for fndef_node in node.body:
                    if isinstance(fndef_node, ast.Expr):
                        # 检查是否为调用表达式
                        if isinstance(fndef_node.value, ast.Call):
                            # 遍历调用表达式的参数
                            for i, arg in enumerate(fndef_node.value.args):
                                if isinstance(arg, ast.Constant):
                                    # 修改参数为"Hacked"
                                    fndef_node.value.args[i] = ast.Constant(value="Hacked")

        ast.fix_missing_locations(root)
        # 将修改后的AST编译为代码对象
        code = compile(root, filename="<ast>", mode="exec")
        # 执行代码对象，将修改后的函数定义到func的全局命名空间中
        exec(code, func.__globals__)
        
        # 调用修改后的函数
        return func.__globals__[func.__name__](*args, **kwargs)
    
    return wrapper

OSError: could not get source code