On Fri, Feb 28, 2014 at 11:51 PM, Nick Coghlan <ncoghlan at gmail.com> wrote: >>> > Are there any other expressions that allow parens around a part of the >>> > expression, without the stuff inside them becoming a completely >>> > separate sub-expression? > > Also generator expressions and most uses of yield or yield from as > embedded expressions. Parentheses are our general "this next bit may > not be following the normal syntax rules" utility, in addition to > being used to override the normal precedence rules (square brackets > and curly braces similarly denote regions where the parsing rules may > differ from the top level ones). In those cases, the "stuff inside the parens" is the entire syntactic structure of that sub-element, right? I was looking for something where there's syntax inside and syntax outside the parens, where what's in the parens isn't just an expression or tuple, so I could try laying out an except expression to imitate that style. The function call is excellent; removing one space from the layout did make the expression look better, but as explained above, I still prefer the current form. Would like to make the parens optional; maybe make them mandatory if there are two except-expressions abutting, or something, but I'd like to simplify the syntax for the common case. Otherwise, current syntax is still my personal preferred. Of course, we still have to convince Guido that this is a good idea at all, syntax or no :) ChrisA
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