Python 之禅（PEP-20 复活节彩蛋）
最早的 Python pep 之一是 PEP-20。这是一份包含 19 篇与 Python 编程相关的论文，名为“The Zen of Python”。这些规则可以追溯到 2004 年，又基于 PEP-8。
一个在 Python 中存在已久的小彩蛋列出了这 19 条规则：
>>> import this 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!
所以只要你有一个 Python REPL，你就可以在你的屏幕上得到这些规则！
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