Help with multiple key sort

[ian.brady1@gmail.com]

gurus:

I want to implement a sql-like sort-by on multiple keys. I've seen
many examples of just two keys.

I have a list like this

1 one 2
1 one 1
1 two 1
1 one 0
1 xx 0

result should be like this

1 four 2
1 one 0
1 one 1
1 one 2
1 xx 0

It moves right while keeping sorted order to the left. This is the
new stable sort in 2.5.

I'm not sure what I'm doing wrong. please help.

Thanks

[Paul Rubin]

Re: Help with multiple key sort

ian.brady1@gmai l.com writes:

It moves right while keeping sorted order to the left. This is the
new stable sort in 2.5.

>>b

['1 one 2', '1 one 1', '1 two 1', '1 one 0', '1 xx 0']

>>sorted(b,key= lambda x: x.split())

['1 one 0', '1 one 1', '1 one 2', '1 two 1', '1 xx 0']

[Jussi Salmela]

Re: Help with multiple key sort

ian.brady1@gmai l.com kirjoitti:

gurus:
>
I want to implement a sql-like sort-by on multiple keys. I've seen
many examples of just two keys.
>
I have a list like this
>
1 one 2
1 one 1
1 two 1
1 one 0
1 xx 0
>
result should be like this
>
1 four 2
1 one 0
1 one 1
1 one 2
1 xx 0
>
It moves right while keeping sorted order to the left. This is the
new stable sort in 2.5.
>
I'm not sure what I'm doing wrong. please help.
>
Thanks
>

I'm not a guru. Maybe that's why I don't understand which "sql-like
sort-by on multiple keys" would produce output that lacks some of the
input but has additional items. ;)

In other words: why don't you show your concrete program and the input
and output data to use. Is the data a list of tuples or lists or what?

Cheers,
Jussi

[ian.brady1@gmail.com]

Re: Help with multiple key sort

Paul already answered it. Tnx Paul. My data is in a file and now I
have to take care to strip \t and \n from it.

Thanks

I'm not a guru. Maybe that's why I don't understand which "sql-like
sort-by on multiple keys" would produce output that lacks some of the
input but has additional items. ;)
>
In other words: why don't you show your concrete program and the input
and output data to use. Is the data a list of tuples or lists or what?
>
Cheers,
Jussi