Trailing comma

[Timo Virkkala]

Alex Martelli wrote:

> Timo Virkkala wrote:
>>Ben Caradoc-Davies wrote:
>>>    d = {
>>>        "A": [1, 5],
>>>        "B": [6, 7],  # last trailing comma is optional but good style
>>>    }
>>Why is it considered good style? I mean, I understand that it's easier
>>to later add a new line, but... 
[snip]
> Learning to use different style in SQL is not going to be difficult,
> because it's such a hugely different language from all of these
> anyway.  Are you afraid to use a * for multiplication because it may
> confuse you to write 'select * from ...'?-)

Touché. =)

> Plus, there are errors which are either diagnosed by the computer
> or innocuous (extra commas are typically that way), and others which
> are NOT diagnosed and can be terribly dangerous (missing commas may be).
> E.g., consider:
> 
> x = [
>   "fee",
>   "fie"
>   "foo",
>   "fum"
> ]

A good example. I didn't spot that on the first look.

Maybe I should get into the habit of always including the trailing comma 
and see where I get. Before this I didn't even know that it was allowed.

--
Timo Virkkala