[Matt Moriarity] >> try surrounding your sum argument in brackets: >> >> sum([phi(x // ps[i+1], i) for i in range(a)]) >> >> instead of: >> >> sum(phi(x // ps[i+1], i) for i in range(a))
[Michael Press] > Thank you. That makes it work. But is a wrong solution ;-) As others have suggested, it's almost certainly the case that you were using a too-old version of Python. 2.5 is current, and 2.4.4 (the current bugfix release in the 2.4 line) would also work. You must have been using a version before 2.4, and if you're just starting with Python, it's a Bad Idea to artificially burden yourself with an old version where current examples can't work ;-) -- http://mail.python.org/mailman/listinfo/python-list
