Python语法def语句及复杂用法实例探究

def greet():
    print("Hello, welcome to Python functions!")

def greet_with_name(name):
    print(f"Hello, {name}! Welcome to Python functions.")

def greet_with_default(name="Guest"):
    print(f"Hello, {name}! Welcome to Python functions.")

def add(a, b):
    return a + b

def arithmetic_operations(a, b):
    return a + b, a - b, a * b, a / b

multiply = lambda x, y: x * y
print(multiply(5, 3))  # 输出 15

def square(x):
    return x * x

def process(func, data):
    return [func(x) for x in data]

numbers = [1, 2, 3, 4, 5]
squared_numbers = process(square, numbers)
print(squared_numbers)  # 输出 [1, 4, 9, 16, 25]

def factorial(n):
    if n == 0 or n == 1:
        return 1
    else:
        return n * factorial(n - 1)

def outer_function():
    print("Outer function")

    def inner_function():
        print("Inner function")

    inner_function()

def my_decorator(func):
    def wrapper():
        print("Something is happening before the function is called.")
        func()
        print("Something is happening after the function is called.")
    return wrapper

@my_decorator
def say_hello():
    print("Hello!")

say_hello()