[Python-Dev] Multiline with statement line continuation (original) (raw)

Ethan Furman ethan at stoneleaf.us
Sat Aug 16 05:29:09 CEST 2014

On 08/15/2014 08:08 PM, Steven D'Aprano wrote:

On Fri, Aug 15, 2014 at 02:08:42PM -0700, Ethan Furman wrote:

On 08/13/2014 10:32 AM, Steven D'Aprano wrote:

(2) Also note that this is already the case, since tuples are made by the commas, not the parentheses. E.g. this succeeds: # Not a tuple, actually two context managers. with open("/tmp/foo"), open("/tmp/bar", "w"): pass Thanks for proving my point! A comma, and yet we did not get a tuple from it. Um, sorry, I don't quite get you. Are you agreeing or disagreeing with me? I spent half of yesterday reading the static typing thread over on Python-ideas and it's possible my brain has melted down wink but I'm confused by your response.

My point is that commas don't always make a tuple, and your example above is a case in point: we have a comma separating two context managers, but we do not have a tuple, and your comment even says so.

is a poor argument (that is, I'm disagreeing with it), since single line parens-free with statements are already syntactically a tuple:

with spam, eggs, cheese: # Commas make a tuple, not parens.

This point I do not understand -- commas /can/ create a tuple, but don't /necessarily/ create a tuple. So, semantically: no tuple. Syntactically: I don't think there's a tuple there this way either. I suppose one of us should look it up in the lexar. ;)

-- Ethan

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