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Improve three recipes in the itertools docs.

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Raymond Hettinger 2004-09-23 07:27:39 +00:00
parent 513c8bd6f2
commit 4533f1fb7f
2 changed files with 19 additions and 7 deletions
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12
Lib/test/test_itertools.py
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@ -746,15 +746,21 @@ Samuele
>>> def all(seq, pred=bool):
... "Returns True if pred(x) is True for every element in the iterable"
... return False not in imap(pred, seq)
... for elem in ifilterfalse(pred, seq):
... return False
... return True
>>> def any(seq, pred=bool):
... "Returns True if pred(x) is True for at least one element in the iterable"
... return True in imap(pred, seq)
... for elem in ifilter(pred, seq):
... return True
... return False
>>> def no(seq, pred=bool):
... "Returns True if pred(x) is False for every element in the iterable"
... return True not in imap(pred, seq)
... for elem in ifilter(pred, seq):
... return False
... return True
>>> def quantify(seq, pred=bool):
... "Count how many times the predicate is True in the sequence"