如何让一个函数识别另一个函数？Python

def func1():
    print("Hello, func1!")

def func2(func):
    func()

func2(func1)

def func1():
    def inner_func():
        print("Hello, inner_func!")
    return inner_func

result = func1()
result()

def decorator(func):
    def wrapper():
        print("Before calling the function")
        func()
        print("After calling the function")
    return wrapper

@decorator
def func():
    print("Hello, func!")

func()

def func():
    print("Hello, func!")

func.custom_attribute = "Custom attribute"

def another_func():
    print(func.custom_attribute)

another_func()