pypers/oxford/lazy.txt


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>>> import itertools
>>> def anyTrue(predicate, iterable): 
...     return True in itertools.imap(predicate, iterable)

>>> def is3(i):
...     print "i=%s" % i
...     return i == 3

>>> anyTrue(is3, range(10))
i=0
i=1
i=2
i=3
True