M.-A. Lemburg writes: > IMO, it was a mistake to have None return a TypeError in > comparisons, since it makes many typical data operations > fail, e.g.
I don't understand this statement. The theory is that they *should* fail. The example of sort is a good one. Sometimes you want missing values to be collected at the beginning of a list, sometimes at the end. Sometimes you want them treated as top elements, sometimes as bottom. And sometimes it is a real error for missing values to be present. Not to mention that sometimes the programmer simply hasn't thought about the appropriate policy. I don't think Python should silently impose a policy in that case, especially given that the programmer may have experience with any of the above treatments in other contexts. _______________________________________________ Python-Dev mailing list Python-Dev@python.org https://mail.python.org/mailman/listinfo/python-dev Unsubscribe: https://mail.python.org/mailman/options/python-dev/archive%40mail-archive.com
