Pythonの禅（PEP 20）：エレガントなコードのための19の不変原則

最も初期のPython PEPの一つがPEP-20です。これはPythonプログラミングに関する19のテーゼのリストで、「Pythonの禅（The Zen of Python）」と呼ばれています。これらのルールは2004年に遡り、PEP-8に基づいています。

Pythonに長く存在する小さなイースターエッグで、これら19のルールを表示できます：

>>> 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!

Python REPLさえあれば、いつでもこれらのルールを画面に表示できます！

Python REPL活用術：アンダースコアで前回結果に瞬時アクセス Python Pillowで画像処理：包括的ガイド

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