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Raymond Hettinger 2016-03-06 18:12:08 -08:00
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Doc/library/itertools.rst
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@ -693,6 +693,11 @@ which incur interpreter overhead.
"Returns the nth item or a default value"
return next(islice(iterable, n, None), default)
def all_equal(iterable):
"Returns True if all the elements are equal to each other"
g = groupby(iterable)
return next(g, True) and not next(g, False)
def quantify(iterable, pred=bool):
"Count how many times the predicate is true"
return sum(map(pred, iterable))