Python Day-功能类型

<code class="python"># 普通函数
def add(x, y):
    return x + y

# Lambda 函数
add_lambda = lambda x, y: x + y

print(add(10, 20))  # 输出: 30
print(add_lambda(10, 20))  # 输出: 30</code>

<code class="python">bigger = lambda x, y: x if x > y else y
print(bigger(10, 5))  # 输出: 10</code>

<code class="python">numbers = [1, 2, 3, 4, 5]
squared_numbers = list(map(lambda x: x**2, numbers))  # 使用 lambda 函数
print(squared_numbers)  # 输出: [1, 4, 9, 16, 25]</code>

<code class="python">numbers = [1, 2, 3, 4, 5, 6]
even_numbers = list(filter(lambda x: x % 2 == 0, numbers))  # 使用 lambda 函数
print(even_numbers)  # 输出: [2, 4, 6]</code>

<code class="python">from functools import reduce
numbers = [1, 2, 3, 4, 5]
sum_of_numbers = reduce(lambda x, y: x + y, numbers)  # 使用 lambda 函数
print(sum_of_numbers)  # 输出: 15</code>

<code class="python">def greet(name):
    print(f"Hello, {name}!")

hello = greet  # 函数别名
hello("World")  # 输出: Hello, World!</code>

<code class="python">def my_decorator(func):
    def wrapper():
        print("Before function execution")
        func()
        print("After function execution")
    return wrapper

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

say_hello()</code>

<code>Before function execution
Hello!
After function execution</code>

<code class="python">def my_generator(n):
    for i in range(n):
        yield i

for i in my_generator(5):
    print(i) # 输出: 0 1 2 3 4</code>