Pythonの `==` と `is`

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pythonでテストを書いていてオブジェクト（辞書）の比較で引っかかったのでメモ。

$ python
Python 2.7.11 (default, Oct  6 2016, 09:16:39)
[GCC 4.2.1 Compatible Apple LLVM 8.0.0 (clang-800.0.38)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> a = { 'a' : 1 }
>>> b = { 'a' : 1 }
>>> a == b
True
>>> a is b
False
>>>

refs.

• https://www.python-izm.com/tips/difference_eq_is/
• https://qiita.com/i13602/items/6d8914e019c13e858c72
• http://dackdive.hateblo.jp/entry/2014/08/07/172135