Times is a small, minimalistic, Python library for dealing with time conversions to and from timezones, for once and for all.
…
times tries to make working with times and timezones a little less of a clusterfuck and hopefully set a standard of some sort.

See my previous posts on working with pytz and dateutil (and also). I’m looking forward to trying out times.

Read Armin Ronacher on “Thoughts on Python 3“.

Because as it stands, Python 3 is the XHTML of the programming language world. It’s incompatible to what it tries to replace but does not offer much besides being more “correct”.

Python 3 kills what makes Python great.

The final bit of magic is in:

from pysqlite2 import dbapi2 as sqlite3

Here’s how I did it. I renamed one of the original images “template.png” and assumed that all the source images will the exactly the same size as the template. I then wrote this Python script using the Python Imaging Library.

import sys
import os
import re
import Image

#
#   Get the template
#
itemplate = Image.open("template.png")
itemplate.getpixel(( 0, 0 ))
r, g, b, alpha = itemplate.split()

#
#   Get the JPGs - they must be exactly the same size
#
for in_file in os.listdir("."):
    if not in_file.endswith(".jpg"):
        continue

    isrc = Image.open(in_file)
    if isrc.size != itemplate.size:
        continue

    idst = isrc.convert("RGBA")
    idst.putalpha(alpha)

    idst.save(in_file[:-4] + ".png")

1. Get OAuth info from foursquare — the callback URL does not matter _but_ you must record here. https://foursquare.com/oauth/register. Fill in the results into CLIENT_ID, CLIENT_SECRET and CALLBACK_URL
2. Run this, enter the URL in browser, get code as FS_ACCESS_CODE, add back here
3. Run this, fill in FS_ACCESS_TOKEN
4. Run this, you’re authorized: enjoy!

Notes

1. Python OAuth2 from here:  https://github.com/rodbegbie/python-oauth2
2. This is entirely standing on the shoulder’s of Rod Begbie’s work.

Code:

import oauth2
import json
import pprint

OAUTH_BASE = "https://foursquare.com/oauth2/authenticate"

CLIENT_ID = ""
CLIENT_SECRET = ""
CALLBACK_URL = ""

FS_ACCESS_CODE = ""
FS_ACCESS_TOKEN = ""

client = oauth2.Client2(CLIENT_ID, CLIENT_SECRET, OAUTH_BASE)

if not CLIENT_ID:
  print "=== Register your Foursquare data here"
  print "=== Copy back CLIENT_ID, CLIENT_SECRET and CALLBACK_URL here"
  print "https://foursquare.com/oauth/"
elif FS_ACCESS_TOKEN:
  headers, content = client.request("https://api.foursquare.com/v2/users/self",
   access_token = FS_ACCESS_TOKEN)

  pprint.pprint({
    "headers" : headers,
    "content" : json.loads(content),
  })
elif not FS_ACCESS_CODE:
  print "=== Enter this URL in your browser."
  print "=== Copy the CODE in the URL that results into FS_ACCESS_CODE"
  print client.authorization_url(redirect_uri = CALLBACK_URL, 
    endpoint='authenticate')
else:
  print "=== Here is your Access Token"
  print "=== Copy into FS_ACCESS_TOKEN as start using Foursquare"
  print client.access_token(FS_ACCESS_CODE, redirect_uri= CALLBACK_URL,
    grant_type='authorization_code')["access_token"]

import re
import string

numeric_rex = re.compile('(\d+)')

def numeric_sorter(a, b):
    av = filter(None, numeric_rex.split(a))
    bv = filter(None, numeric_rex.split(b))

    while av and bv:
        af = av.pop(0)
        bf = bv.pop(0)

        if af[0] in string.digits and bf[0] in string.digits:
            r = cmp(int(af), int(bf))
        else:
            r = cmp(af, bf)

        if r != 0:
            return  r

    if av:
        return  1
    elif bv:
        return  -1
    else:
        return  0

Here’s an example of it being used:

>>> items = [ "Item1", "Item10", "Item", "Item9", "Item100", "ItemLogo", ]
>>> items.sort()
>>> pprint.pprint(items)
['Item', 'Item1', 'Item10', 'Item100', 'Item9', 'ItemLogo']
>>> items.sort(numeric_sorter)
>>> pprint.pprint(items)
['Item', 'Item1', 'Item9', 'Item10', 'Item100', 'ItemLogo']

# MARK: comment
# TODO: comment
# FIXME: comment
# !!!: comment
# ???: comment

From here.

1. Download the source from http://libjpeg.sourceforge.net/

2. Extract, configure, make:

tar zxvf jpegsrc.v6b.tar.gz
cd jpeg-6b
cp /usr/share/libtool/config/config.sub .
cp /usr/share/libtool/config/config.guess .
./configure --enable-shared --enable-static
make


3. You may need to create the following directories:

sudo mkdir -p /usr/local/include
sudo mkdir -p /usr/local/lib
sudo mkdir -p /usr/local/man/man1


4. Now you can install it as usual.

sudo make install

I used to use Fink on Leopard, but it didn’t seem to work to well this time. If you’ve previously made an attempt at installing PIL, make sure to rm -rf build.

  File "/Library/Python/2.6/site-packages/django/db/models/fields/related.py", line 257, in __get__
    rel_obj = QuerySet(self.field.rel.to).get(**params)
  File "/Library/Python/2.6/site-packages/django/db/models/query.py", line 300, in get
    num = len(clone)
  File "/Library/Python/2.6/site-packages/django/db/models/query.py", line 81, in __len__
    self._result_cache = list(self.iterator())
  File "/Library/Python/2.6/site-packages/django/db/models/query.py", line 251, in iterator
    obj = self.model(*row[index_start:aggregate_start])
  File "/Library/Python/2.6/site-packages/django/db/models/base.py", line 324, in __init__
    signals.post_init.send(sender=self.__class__, instance=self)
  File "/Library/Python/2.6/site-packages/django/dispatch/dispatcher.py", line 166, in send
    response = receiver(signal=self, sender=sender, **named)
  File "/Library/Python/2.6/site-packages/django/db/models/fields/files.py", line 368, in update_dimension_fields
    (self.width_field and not getattr(instance, self.width_field))
AttributeError: 'Icon' object has no attribute 'width'

The issue turns out to be that you can’t just define the ImageField in your model, you also have to explicitly define the fields that will store the width and height fields for the image field. The sql generation tools for Django don’t do it for you.

For various reasons, I can’t do that this at this moment so I made the following I hack which I strongly recommend you don’t use (for efficiency reasons, as with this the height & width have to be computed every time you access the image). This is added to site-packages/django/db/models/fields around line 367.

if self.width_field and not hasattr(instance, self.width_field):
     dimension_fields_filled = False
else:
     dimension_fields_filled = not(
          (self.width_field and not getattr(instance, self.width_field))
          or (self.height_field and not getattr(instance, self.height_field))
     )

The proper solutions probably involve:

• not adding the hack above and explicitly adding the fields, as per here
• updating the documentation (here and here) to say “you also have to add the fields to the DB”
• making syncdb/sql automatically generate the width & height fields

print [ not i % 15 and "Fizz Buzz" or not i % 5 and "Buzz" or not i % 3 and "Fizz" or i for i in xrange(1, 101) ]

My preference is to really have a few more brackets in there, for clarity but apparently terseness is considered a virtue in and off itself sometimes. There’s other implementations of this in one line of Python:

• Sogeti Phoenix
• Scaevolus on Codepad – have a drink before you look at this one