On Thu, Nov 22, 2018 at 07:54:06AM +1100, Chris Angelico wrote: > > if item in list == item_should_be_in_list(): > > # "good" state, i.e. is true if item is in list and should be, or isn't > > and shouldn't. > > ... > > If I saw this in _any_ language, I would want it to be parenthesized > for clarity. This kind of comparison is extremely unusual, and > benefits from not making assumptions about how comparisons chain. And > parenthesized, it will work the same way in any language.
I tend to agree in practice, but the idealist in me wants to say that's poppycock--every language has rules for expression evaluation and operator precedence, and that is all the clarity that should be required. If you don't know them, parens or not, you're going to get it wrong some of the time, and writing superfluous code to compensate for other people's inadequacies is irksome. The pragmatist in me admits that there's no good argument here, and sometimes (as in this case) "other people" is me. :( -- https://mail.python.org/mailman/listinfo/python-list
