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A comment on Python strings are immutable, but only sometimes. Parent comment

Re:Python strings are immutable, but only sometimes by mannerheim on Tuesday February 16, 2021 @12:58AM (#26151355)
You could use '== None' instead, but it's generally recommended to use 'is None' (supposedly this is slightly faster). I don't think I've ever encountered anything else relying on 'is'. IMO the 'is' keyword was a poor language decision, given how rarely it's ever used.
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Re:Python strings are immutable, but only sometimes by mannykannot on Tuesday February 16, 2021 @07:35AM (#26153292)
I agree. 'is' creates opportunities for possibly counter-intuitive implementation dependency, for very little gain.
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