Peter, Thanks for the code for a custom key. That will come in handy later down the track.
-----Original Message----- From: Tutor <tutor-bounces+mhysnm1964=gmail....@python.org> On Behalf Of Peter Otten Sent: Sunday, 13 January 2019 10:00 PM To: tutor@python.org Subject: Re: [Tutor] Debugging a sort error. mhysnm1...@gmail.com wrote: > Issue, following error is generated after trying to sort a list of > strings. > > description.sort() > TypeError: unorderable types: float() < str() Consider >>> descriptions = ["foo", "bar", 123, 3.14, 42, 200.1, "0"] >>> sorted(descriptions) Traceback (most recent call last): File "<stdin>", line 1, in <module> TypeError: unorderable types: int() < str() If there are only numbers and strings in the list you can force the sort to succeed with the following custom key function: >>> def key(item): ... return isinstance(item, str), item ... This will move the numbers to the beginning of the list: >>> sorted(descriptions, key=key) [3.14, 42, 123, 200.1, '0', 'bar', 'foo'] _______________________________________________ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: https://mail.python.org/mailman/listinfo/tutor _______________________________________________ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: https://mail.python.org/mailman/listinfo/tutor
