如何从我的函数中调用函数？

def func1():
    print("This is func1")

def func2():
    print("This is func2")
    func1()  # 直接调用func1

func2()

def countdown(n):
    if n <= 0:
        print("Blastoff!")
    else:
        print(n)
        countdown(n-1)  # 递归调用countdown

countdown(5)

def greet(name):
    print("Hello, " + name + "!")

def call_func(func, name):
    func(name)  # 调用传入的函数

call_func(greet, "Alice")

def call_func(func):
    func("World")  # 调用传入的函数

call_func(lambda x: print("Hello, " + x + "!"))