Hi Laurent, It is not clear to me what you mean by "filter by indices".
On Sat, Oct 02, 2021 at 10:25:05PM +0200, Laurent Lyaudet wrote: > The idea is to filter a list by indices : [...] > Since filter() returns an iterator instead of a list, it could do what > is needed... if the callback had access to the index like the > Javascript array filter function. Do you mean this? https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/filter You shouldn't assume we are all experts on Javascript :-) If that is what you want, it is easy to get access to the index. We can just do: filter(function, enumerate(items)) and so long as function takes two arguments, it will be fine. It is a little bit trickier to get the Javascript three argument version, but with a one-liner helper function, it is easy: def js_enumerate(sequence): for index, obj in enumerate(sequence): yield (index, obj, sequence) filter(function, js_enumerate(items)) If you want something else, I'm afraid you will have to explain in more detail what you want, sorry. -- Steve _______________________________________________ Python-ideas mailing list -- python-ideas@python.org To unsubscribe send an email to python-ideas-le...@python.org https://mail.python.org/mailman3/lists/python-ideas.python.org/ Message archived at https://mail.python.org/archives/list/python-ideas@python.org/message/MFSXBBBKM73KWDYRQYQK6EZTIQS3GUOA/ Code of Conduct: http://python.org/psf/codeofconduct/
