On Tuesday 28 October 2003 02:48 am, Greg Ewing wrote:
Alex Martelli <aleaxit@yahoo.com>:
My slight preference for leaving += and friends alone is that a function using them to rebind nonlocals would be hard to read
Using my "outer" suggestion, augmented assignments to nonlocals would be written
outer x += 1
which would make the intention pretty clear, I think.
Absolutely clear, and wonderful. Pity that any alternative to 'global' has been declared "a lost cause" by Guido. I'd still like to forbid "side effect rebinding" via statements such as class, def, import, for, i.e., no outer def f(): ... and the like; i.e., the 'outer' statement should be 'outer' expr_stmt (in Grammar/Grammar terms) with the further constraint that the expr_stmt must be an assignment (augmented or not); and the outer statement should not be a 'small_stmt', so as to avoid the ambiguity of outer x=1; y=2 (is this binding a local or nonlocal name 'y'?). Alex