[issue32915] Running Python 2 with -3 flag doesn't complain about cmp/__cmp__

[Stefan Behnel]

Stefan Behnel <stefan_ml at behnel.de> added the comment:

> cmp(a,b) can be replaced with (a>b)-(a<b)

That is assuming that "a > b" and "a < b" both return something that supports the minus operator, such as a boolean value. That might not be the case, and it is definitely impossible to infer automatically from a given piece of code.

Besides, even if the transformation happens to be correct in a given case, the result is definitely also very difficult to read and understand. IMHO, "but it keeps working" isn't enough of an argument here.

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nosy: +scoder

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<https://bugs.python.org/issue32915>
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