On 17 October 2011 13:05, Nick Coghlan <ncoghlan@gmail.com> wrote:
For comprehensions, the parallel with the proposed given statement would be almost exact:
seq = [x*y for x in range(10) for y in range(5)]
would map to:
seq = _list_comp given _outermost_iter = range(10): _list_comp = [] for x in _outermost_iter: for y in range(5): _list_comp.append(x*y)
Whoa... NAME1 = EXPR1 given NAME2 = EXPR2: ASSIGNMENT FOR LOOP ???? Surely that doesn't match the behaviour for "given" that you were suggesting? Even if I assume that having _outermost_iter = range(10) before the colon was a typo, having a for loop in the given suite scares me. I can see what it would mean in terms of pure code-rewriting semantics, but it doesn't match at all my intuition of what the term "given" would mean. I'd expect the given suite to only contain name-definition statements (assignments, function and class definitions). Anything else should be at least bad practice, if not out and out illegal... Paul.