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itertools doc: examples for groupby() and tee() (#120618)

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Frank Dana 2024-06-17 09:19:14 -04:00 committed by GitHub
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@ -58,12 +58,12 @@ Iterator Arguments Results
:func:`compress` data, selectors (d[0] if s[0]), (d[1] if s[1]), ... ``compress('ABCDEF', [1,0,1,0,1,1]) → A C E F``
:func:`dropwhile` predicate, seq seq[n], seq[n+1], starting when predicate fails ``dropwhile(lambda x: x<5, [1,4,6,3,8]) → 6 3 8``
:func:`filterfalse` predicate, seq elements of seq where predicate(elem) fails ``filterfalse(lambda x: x<5, [1,4,6,3,8]) → 6 8``
:func:`groupby` iterable[, key] sub-iterators grouped by value of key(v)
:func:`groupby` iterable[, key] sub-iterators grouped by value of key(v) ``groupby(['A','B','ABC'], len) → (1, A B) (3, ABC)``
:func:`islice` seq, [start,] stop [, step] elements from seq[start:stop:step] ``islice('ABCDEFG', 2, None) → C D E F G``
:func:`pairwise` iterable (p[0], p[1]), (p[1], p[2]) ``pairwise('ABCDEFG') → AB BC CD DE EF FG``
:func:`starmap` func, seq func(\*seq[0]), func(\*seq[1]), ... ``starmap(pow, [(2,5), (3,2), (10,3)]) → 32 9 1000``
:func:`takewhile` predicate, seq seq[0], seq[1], until predicate fails ``takewhile(lambda x: x<5, [1,4,6,3,8]) → 1 4``
:func:`tee` it, n it1, it2, ... itn splits one iterator into n
:func:`tee` it, n it1, it2, ... itn splits one iterator into n ``tee('ABC', 2) → A B C, A B C``
:func:`zip_longest` p, q, ... (p[0], q[0]), (p[1], q[1]), ... ``zip_longest('ABCD', 'xy', fillvalue='-') → Ax By C- D-``
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