Jyotirmoy Bhattacharya <[EMAIL PROTECTED]> writes: > print [(m,n) for m in range(5) for n in multab(m) if m>2]
> I was wondering if there is some way to write the if-clause so that it > is 'hoisted' out of the inner loop and the multab function is not > called at all for m=0,1,2. That would seem to be important if multab > were an expensive function. Maybe you mean print [(m,n) for m in [a for a in range(5) if a > 2] for n in multab(m)] You'd probably really write print [[(m,n) for m in range(3,5)] for n in multab(m)] You should also use xrange instead of range, if the range might be large. And you could use a generator expression instead of a listcomp for the inner list. -- http://mail.python.org/mailman/listinfo/python-list
