[Tutor] Sorting and secondary sorting.

[Kent Johnson]

Liam Clarke wrote:
> Hi all,
> 
> I'm trying to think of a way to sort a list of dictionaries. In pseudo-code:
> 
> l = [ { "host":"foo", "db":"bob"},
>        { "host":"foo", "db":"dave"},
>        { "host":"fee", "db":"henry"}
>      ]
> 
> l.sort( key = lambda item: item["host"], second_key = lambda item: item["db"])
> 
> Which, if all went well, would give me -
> 
> l = [ { "host":"fee", "db":"henry"}
>        { "host":"foo", "db":"bob"},
>        { "host":"foo", "db":"dave"},
>         ]
> 

Just make a key that includes both of the values you want to sort on as 
a tuple:

l.sort( key = lambda item: (item["host"], item["db"]))

Kent