On Mon, 15 Dec 2008 02:11:10 +0000, Lie Ryan wrote: >> So given the normal precedence rules of Python, there is no ambiguity. >> True, you have to learn the rules, but that's no hardship. > > *I* know about the precedence rule, but a newbie or a tired programmer > might not. He might want to reverse the truth value of argument b but > instead has just reversed the whole expression.
And? A newbie or a tired programmer might not know that a^b is bit-wise xor instead of exponentiation, or that range(n) doesn't include n, or even that len(alist) returns the length of a list. There's no limit to the potential mistakes that are possible for a programmer who is tired, inexperienced, intoxicated or just plain stupid enough. What's your point? Are you expecting Python to be mistake-proof? There's a certain level of knowledge about the language necessary to program effectively, and learning that "is not" is a single operator is not particularly onerous. -- Steven -- http://mail.python.org/mailman/listinfo/python-list
