摘要：
We can place lambda function inside list and dictionary literals. This way we can use lambda expressions to create jump tables. >>> L = [lambda s: s.s
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posted @ 2024-07-31 17:11
ZhangZhihuiAAA
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A closure is a nested function that can access free variables from an enclosing function even after it has finished its execution. We know that, like
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posted @ 2024-07-31 17:08
ZhangZhihuiAAA
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We have used functions to decorate functions and to decorate classes. Now, we will see how to define a class as a decorator. At the start of this chap
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posted @ 2024-07-31 16:24
ZhangZhihuiAAA
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When we talk about decorating classes, we can either decorate individual methods or we can create a decorator to decorate the whole class. class MyCla
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posted @ 2024-07-31 15:28
ZhangZhihuiAAA
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A decorator is a callable that takes a callable as input and returns a callable. This is the general definition of a decorator. The callable in this d
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posted @ 2024-07-31 15:19
ZhangZhihuiAAA
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The task of implementing iterators can be simplified by using generators. We have seen how to create custom iterators using the object-oriented way, i
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posted @ 2024-07-31 11:20
ZhangZhihuiAAA
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The itertools module contains special functions to create iterators for efficient looping. It has three broad categories of iterators - infinite itera
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posted @ 2024-07-31 10:40
ZhangZhihuiAAA
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If we want objects of this class to be used in iteration contexts, then they should support the iteration protocol. To make this class iterable, we ca
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posted @ 2024-07-31 10:33
ZhangZhihuiAAA
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In our first example, we will create iterable objects, which, when iterated over, will give out cubes of numbers, and these objects will support multi
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posted @ 2024-07-31 10:29
ZhangZhihuiAAA
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There are many built-in functions and methods that return iterables and iterators. Here are a few examples: range() returns an iterable dict.keys() re
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posted @ 2024-07-31 09:43
ZhangZhihuiAAA
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