提升Python编程水平必不可少的重构技巧

# 列表推导式
list_comp = [x * 2 for x in range(10)]

# 生成器表达式
gen_exp = (x * 2 for x in range(10))

# 生成器函数
def countdown(num):
    while num > 0:
        yield num
        num -= 1

# 装饰器示例
def my_decorator(func):
    def wrapper(*args, **kwargs):
        print("Before function execution")
        result = func(*args, **kwargs)
        print("After function execution")
        return result
    return wrapper

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

say_hello()

# 使用enumerate()简化代码
my_list = ['apple', 'banana', 'orange']
for index, value in enumerate(my_list):
    print(index, value)

# 简化条件表达式
x = 10
result = "Even" if x % 2 == 0 else "Odd"
print(result)

# 使用*args和**kwargs
def my_func(*args, **kwargs):
    for arg in args:
        print(arg)
    for key, value in kwargs.items():
        print(f"{key}: {value}")

my_func(1, 2, 3, name='Alice', age=30)

# 使用特性（property）
class Circle:
    def __init__(self, radius):
        self._radius = radius

    @property
    def radius(self):
        return self._radius

    @radius.setter
    def radius(self, value):
        if value < 0:
            raise ValueError("Radius cannot be negative")
        else:
            self._radius = value