Sorting Objects by property using locale

[Donn Ingle]

Hi,
Well, I'm beat. I can't wrap my head around this stuff.

I need to create a list that will contain objects sorted by a "name"
property that is in the alphabetical order of the user's locale.

I used to have a simple list that I got from os.listdir and I could do this:
l = os.listdir(".")
l.sort(locale.strcoll)
Which would work fine.

But now I need to make objects (of different stripes) for each of the
filenames returned and then I want to collect them all into a main list and
have *that* main list be sorted.

I started some test code like this: I hope the odd characters show.

# -*- coding: utf8 -*-

class Test(object):
def __init__(self,nam):
self.name = nam
def __cmp__(self, other):
return cmp(self.name, other.name)

l = [ Test("ABILENE.ttf"), Test("Ã…rgate.ttf"), Test("Ã¥rse.ttf"),
Test("Ärt.ttf"), Test("MomentGothic.ttf"), Test("öggi.ttf"),
Test("Öhmygawd.ttf")]

import locale

l.sort() # won't work -> locale.strcoll)

for i in l: print i.name


Can anyone give me a leg-up?

\d

 

[thebjorn]

Hi,
Well, I'm beat. I can't wrap my head around this stuff.

I need to create a list that will contain objects sorted by a "name"
property that is in the alphabetical order of the user's locale.

I used to have a simple list that I got from os.listdir and I could do this:
l = os.listdir(".")
l.sort(locale.strcoll)
Which would work fine.

But now I need to make objects (of different stripes) for each of the
filenames returned and then I want to collect them all into a main list and
have *that* main list be sorted.

I started some test code like this: I hope the odd characters show.

# -*- coding: utf8 -*-

class Test(object):
def __init__(self,nam):
self.name = nam
def __cmp__(self, other):
return cmp(self.name, other.name)

l = [ Test("ABILENE.ttf"), Test("Årgate.ttf"), Test("årse.ttf"),
Test("Ärt.ttf"), Test("MomentGothic.ttf"), Test("öggi.ttf"),
Test("Öhmygawd.ttf")]

import locale

l.sort() # won't work -> locale.strcoll)

for i in l: print i.name


Can anyone give me a leg-up?

\d

You need to use the key argument to the sort function as well as the
cmp argument:

import os, locale

locale.setlocale(locale.LC_ALL, 'NO')

class Test(object):
def __init__(self, name):
self.name = name
def __str__(self):
return self.name

fnames = [Test(fname) for fname in os.listdir('.')]
fnames.sort(cmp=locale.strcoll, key=lambda t:t.name)

for fname in fnames:
print fname

and the output was

abel.txt
aegis.txt
onsdag.txt
pysortdir.py
pysortdir.py~
ærlig.txt
ønske.txt
åbel.txt
aaron.txt
åte.txt

Which is even more correct than I hoped for -- in Norwegian, aa is
pronounced the same as å (which is the 29th letter in the Norwegian
alphabet) and is sorted according to pronunciation.

-- bjorn

 

[Donn Ingle]

Which is even more correct than I hoped for -- in Norwegian, aa is

pronounced the same as å (which is the 29th letter in the Norwegian
alphabet) and is sorted according to pronunciation.

Much appreciated bjorn.

\d