Laurent Pointal wrote:
>>>> f(4,i for i in range(10)) > File "<stdin>", line 1 > SyntaxError: invalid syntax > > > Why does Python allow generator expression parenthesis to be mixed with > function call parenthesis when there is only one parameter ? For simplicity and elegant coding, so you can do something like you did at first: sum(i for i in range(10)) > IMHO this should be forbidden, usage must not be different when there is > only one parameter and when there are more parameters. The problem in your last test is that if you use more than one argument, you *must* use the parenthesis. In Py2.5 there's a better message error: >>> f(4,i for i in range(10)) File "<stdin>", line 1 SyntaxError: Generator expression must be parenthesized if not sole argument The correct way to do that is: >>> f(4,(i for i in range(10))) 4 (<generator object at 0xb7dab56c>,) Regards, -- . Facundo . Blog: http://www.taniquetil.com.ar/plog/ PyAr: http://www.python.org/ar/ -- http://mail.python.org/mailman/listinfo/python-list
