Hello, Its probably a priority of avalauation in the chain of operators ans
association of themselves. I'm not sure. Philippe.
De : "BlindAnagram"
A : python-list@python.org
Envoyé: dimanche 6 Novembre 2022 00:57
Objet : Re: comprehension parsing
On 05/11/2022 22:11, MRAB wrote: > On 2022-11-05 18:52, cactus wrote: >> On
Saturday, 5 November 2022 at 16:06:52 UTC, cactus wrote: >> >> I should have
quoted the full comprehensions: >> >> all((srt(m, n) in c_np) == (srt(a, b)
in c_ap) for (m, a), (n, b) >> in combinations(na8, 2)) >> all( srt(m, n) in
c_np == srt(a, b) in c_ap) for (m, a), (n, b) >> in combinations(na8, 2)) >
> The comparison operators can be chained, so: > > a == b == c > > is
equivalent to: > > (a == b) and (b == c) > > except that the common term
('b' in this case) is evaluated only once. > > 'in' is one of those comparison
operators, so: > > srt(m, n) in c_np == srt(a, b) in c_ap > > is
equivalent to: > > (srt(m, n) in c_np) and (c_np == srt(a, b)) and (srt(a,
b) in c_ap) > > except that the common terms ('c_np' and 'srt(a, b)') are
evaluated only > once. > > Chaining makes most sense with multiple '==' or a
series of '<' and/or > '<=' or a series of '>' and/or '>=', as in '1 <= n <=
10'. Thanks for a most helpful explanation --
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