On 12/13/2010 11:17 AM, Antoine Pitrou wrote:
On Mon, 13 Dec 2010 14:09:02 -0500
Alexander Belopolsky<alexander.belopol...@gmail.com>  wrote:

On Mon, Dec 13, 2010 at 11:54 AM, Guido van Rossum<gu...@python.org>  wrote:
I'm at least +0 on
allowing trailing commas in the situation the OP mentioned.

FWIW, I am also about +0.5 on allowing trailing comma.  Note that in a
similar situation,  the C standardization committee has erred on the
side of consistency:

"""
A new feature of C99: a common extension in many implementations
allows a trailing comma after the list of enumeration constants. The
Committee decided to adopt this feature as an innocuous extension that
mirrors the trailing commas allowed in initializers.
""" http://www.open-std.org/jtc1/sc22/wg14/www/C99RationaleV5.10.pdf

Similarly, I find allowing trailing comma in keyword only arguments
lists to be an innocuous extension that mirrors the trailing commas
allowed in the positional arguments lists.
+1 from me as well. Special cases are hard to remember.

+1. I tend to put them in, and then take out the ones that Python won't accept. Then, when I add another item to the list, Python tells me to go back and put the one I took out back in again, and take out the one I put in at the new end of the list. Annoying. (for vertically arranged lists, one per line, primarily, with ) on the last line by itself.
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