関連ワード:  what does immutable mean in python    what does immutable mean in python data structures    what is immutable mean in python    what does string immutability mean in python    what does mutable and immutable mean in python    what does the term immutability mean in python    what does immutable mean with respect to python strings    what does immutable mean which data type in python are immutable    what does it mean if something is immutable in python    what do you mean by immutable in python