the Zen of Python（Python之禅）是Python语言的指导原则。
查看Python之禅的原则，可以输入命令import this
执行结果：
The Zen of Python, by Tim Peters
Beautiful is better than ugly.
Explicit is better than implicit.
Simple is better than complex.
Complex is better than complicated.
Flat is better than nested.
Sparse is better than dense.
Readability counts.
Special cases aren't special enough to break the rules.
Although practicality beats purity.
Errors should never pass silently.
Unless explicitly silenced.
In the face of ambiguity, refuse the temptation to guess.
There should be one-- and preferably only one --obvious way to do it.
Although that way may not be obvious at first unless you're Dutch.
Now is better than never.
Although never is often better than *right* now.
If the implementation is hard to explain, it's a bad idea.
If the implementation is easy to explain, it may be a good idea.
Namespaces are one honking great idea -- let's do more of those!
简短的翻译一下：
The Zen of Python, by Tim Peters #Python 之禅，作者 Tim Peters
Beautiful is better than ugly. #优美胜于丑陋，Python编写优美的代码为目标。
Explicit is better than implicit.#明了胜于晦涩，代码要简单明了。
Simple is better than complex.#简单胜于复杂，代码能简单就不要复杂。
Complex is better than complicated.#复杂胜于凌乱，如果代码需要复杂，尽量是代码关系简单。
Flat is better than nested.#扁平胜于嵌套，代码是扁平的不要有太多的嵌套。
Sparse is better than dense.#间隔胜于紧凑，代码有适当的间隔，让后面的人方便阅读。
Readability counts.#可读性很重要，优美的代码要具有较高的可读性。
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