以下是针对 Python 开发的一些常用代码片段模板,可以帮助开发者快速构建项目。

列表推导式

使用列表推导式可以简洁地创建列表,以下是一个示例:

numbers = [1, 2, 3, 4, 5]
squared_numbers = [x**2 for x in numbers]

函数定义

定义函数时,可以指定默认参数和可变参数,如下:

def greet(name, msg="Hello"):
    print(msg, name)

greet("Alice")  # 输出: Hello Alice
greet("Bob", "Goodbye")  # 输出: Goodbye Bob

生成器

生成器可以用来创建迭代器,以下是一个生成器函数的示例:

def even_numbers():
    for number in range(1, 10):
        if number % 2 == 0:
            yield number

for num in even_numbers():
    print(num)  # 输出: 2 4 6 8

装饰器

装饰器可以用来修改函数的行为,以下是一个简单的装饰器示例:

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()
# 输出:
# Something is happening before the function is called.
# Hello!
# Something is happening after the function is called.

更多 Python 代码片段

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