Python and timezones

[shandy.b at gmail.com]

I'm trying to write some code to deal with world timezones, and I'm
getting a strange result.  America/Iqaluit should not be showing up in
UTC+00:00, but it is.  Can anyone see what's wrong with this code?


import time
from datetime import datetime
import os
import pytz

def getZoneNamesOnThisComputer():
    for i in pytz.all_timezones:
        if os.path.exists( os.path.join('/tmp/usr/share/zoneinfo/',
i)):
            yield i


def getZonesGroupedByOffset():
    '''return a dict of all the zone names , grouped by their offset
    eg:
    {'-0400': ['America/Blanc-Sablon', 'Etc/GMT+4'],
     '+0000': ['America/Iqaluit', 'Etc/GMT', 'Europe/Belfast', 'GB',
'GMT'],
     ...
    }
    '''
    Y,M,D,h,m,s = time.localtime()[:6]

    zonesGroupedByOffset = {}

    for name in getZoneNamesOnThisComputer():
        tz = pytz.timezone(name)
        now = datetime(Y,M,D,h,m,s, tzinfo=tz)
        # strfime returns a string like "-0800" or "+0430" or "0000"
        offsetKey = now.strftime('%z')
        if not zonesGroupedByOffset.has_key(offsetKey):
            zonesGroupedByOffset[offsetKey] = []
        zonesGroupedByOffset[offsetKey].append(name)
    return zonesGroupedByOffset


z = getZonesGroupedByOffset()
print z['+0000']

# Why is America/Iqaluit showing up here???