Using namedtuples field names for column indices in a list of lists
__peter__ at web.de
Mon Jan 9 18:27:20 EST 2017
Rhodri James wrote:
> On 09/01/17 21:40, Deborah Swanson wrote:
>> Peter Otten wrote, on January 09, 2017 6:51 AM
>>> records = sorted(
>> Good, this is confirmation that 'sorted()' is the way to go. I want a 2
>> key sort, Description and Date, but I think I can figure out how to do
> There's a handy trick that you can use because the sorting algorithm is
> stable. First, sort on your secondary key. This will leave the data in
> the wrong order, but objects with the same primary key will be in the
> right order by secondary key relative to each other.
> Then sort on your primary key. Because the sorting algorithm is stable,
> it won't disturb the relative order of objects with the same primary
> key, giving you the sort that you want!
> So assuming you want your data sorted by date, and then by description
> within the same date, it's just:
> records = sorted(
While stable sort is nice in this case you can just say
Personally I'd only use sorted() once and then switch to the sort() method.
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