十. Python基础(10)--装饰器 1 ● 装饰器 A decorator is a function that take a function as an argument and return a function. We can use a decorator to extend the functionality of an existing function without changing its source. Decorators are syntactic sugar.
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10.1 A list is a sequenceLike a string, a list is a sequence of values. In a string, the values are characters; in a list, they can be any type. The values in a list are called elements or sometimes items.There are several ways to create a new list;