New submission from Walid Taha <wt...@fb.com>:
The documentation for list comprehensions contains the following phrase: "As we saw in the previous section, the nested listcomp is evaluated in the context of the for that follows it, so this example is equivalent to:" This should be corrected, as it currently contradicts what was said previously, which is that list comprehensions and the conditional they contain are scoped in the same order as they appear (rather than the reverse). This issue can be found on this page: https://docs.python.org/3/tutorial/datastructures.html It also seems to appear in the most recent version: https://docs.python.org/3.10/tutorial/datastructures.html To confirm that the first (and not the second statement) is correct, you may consider the following code: l=[] for x in range(0,3): for y in range (0,x+1): l.append((x,y)) print(l) l=[(x,y) for x in range (0,3) for y in range (0,x+1)] print(l) Which run on 3.7.5 produces the following output [(0, 0), (1, 0), (1, 1), (2, 0), (2, 1), (2, 2)] [(0, 0), (1, 0), (1, 1), (2, 0), (2, 1), (2, 2)] ---------- assignee: docs@python components: Documentation messages: 375665 nosy: docs@python, wtaha priority: normal severity: normal status: open title: Comprehensions documentation versions: Python 3.8 _______________________________________ Python tracker <rep...@bugs.python.org> <https://bugs.python.org/issue41591> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
