"[EMAIL PROTECTED]" wrote: > Alex Martelli wrote: > > This becomes a valid list comprehension by writing 'if' instead of > > 'when'. > > valid, yes. efficient, I am not sure. > > [ x for x in xrange(10000000) if p(x) ] > > means I need to go through the whole range even if p = lambda x: x < 2
Itertools is your friend in this case: >>> from itertools import takewhile >>> list(takewhile(p, xrange(10000000))) [0, 1] George -- http://mail.python.org/mailman/listinfo/python-list
