how do to sort a python dictionary with multiple attributes and unicode strings

Question

I have a list of dictionaries with some strings containing artists and their albums (fetched from Spotify). I want to sort this dictionary by artist first and then by album. But I want to use a locale aware sort (German in my case).

I found out that I can sort a list of dictionaries with multiple key like so:

somelist.sort(key=lambda k: (k['artist'].lower(), k["album"].lower()))

.lower because I want a case insensitive sort.

This works fine for English named artists and albums, but not for none-English. I found also out that for locale aware sorts I can use somelist.sort(key=locale.strxfrm).

What I don't understand: How can I combine locale-aware AND multiple key sorts?

David Maust · Accepted Answer · 2016-01-02 19:35:43Z

2

Why not compose the two?

def normalizeSortString(s):
    return local.strxfrm(s).lower()

def getSortKey(k):
    return (normalizeSortString(k['artist']), normalizeSortString(k["album"]))

somelist.sort(key=getSortKey)

answered Jan 2, 2016 at 19:35

David Maust

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