operator_attrgetter.py

#!/usr/bin/env python


from operator import *


class MyObj(object):
    """example class for attrgetter"""
    def __init__(self, arg):
        super(MyObj, self).__init__()
        self.arg = arg

    def __repr__(self):
        return 'MyObj(%s)' % self.arg

l = [MyObj(i) for i in xrange(5)]
print 'objects  :', 1

# Extract the 'arg' value from each object
g = attrgetter('arg')
vals = [g(i) for i in l]
print 'arg values:', vals

# Sort using arg
l.reverse()
print 'reversed :', l
print 'sorted   :', sorted(l, key=g)