DATABASES = {
    'default': {
        'NAME': 'app_data',
        'ENGINE': 'django.db.backends.postgresql_psycopg2',
        'USER': 'postgres_user',
        'PASSWORD': 's3krit'
    },
    'users': {
        'NAME': 'user_data',
        'ENGINE': 'django.db.backends.mysql',
        'USER': 'mysql_user',
        'PASSWORD': 'priv4te'
    }
}

class MyAppRouter(object):
    """myappアプリケーションのモデルを別DBに保存し、
    DBの操作を制御する"""

    def db_for_read(self, model, **hints):
        "'myapp'の場合、'other'というDBを使う。"
        if model._meta.app_label == 'myapp':
            return 'other'
        return None

    def db_for_write(self, model, **hints):
        "'myapp'の場合、'other'というDBを使う。"
        if model._meta.app_label == 'myapp':
            return 'other'
        return None

    def allow_relation(self, obj1, obj2, **hints):
        "両方のモデルが'myapp'に入っている場合のみにリレーションを許可"
        if obj1._meta.app_label == 'myapp' or obj2._meta.app_label == 'myapp':
            return True
        return None

    def allow_syncdb(self, db, model):
        "'myapp' を 'other' DB のみに入れるようにする。"
        if db == 'other':
            return model._meta.app_label == 'myapp'
        elif model._meta.app_label == 'myapp':
            return False
        return None

from django.contrib import messages
messages.add_message(request, messages.INFO, 'Hello world.')

messages.success(request, u'プロフィールを更新しました。')
messages.warning(request, u'サービス契約が後3日で切ります。')
messages.error(request, u'レコードが削除されました')

{% if a != b %}
    ...
    {% if c == d and e >= f %}
    ...
    {% endif %}
 ...
{% endif %}

PIP_DOWNLOAD_CACHE=~/.pip_cache

# virtualenv毎に pip をインストールする場合
#easy_install pip

pip install ipython

# pudb も便利かもよ
#pip install pudb

# Most of your config files and extensions will probably start with this import
import os

import IPython.ipapi
ip = IPython.ipapi.get()

# You probably want to uncomment this if you did %upgrade -nolegacy
# import ipy_defaults

def main():
    # Handy tab-completers for %cd, %run, import etc.
    # Try commenting this out if you have completion problems/slowness
    # import ipy_stock_completers

    # uncomment if you want to get ipython -p sh behaviour
    # without having to use command line switches

    # import ipy_profile_sh


    o = ip.options
    # An example on how to set options
    #o.autocall = 1
    o.system_verbose = 0

    import_all("os sys")
    execf('~/.ipython/virtualenv.py')

# some config helper functions you can use
def import_all(modules):
    """ Usage: import_all("os sys") """
    for m in modules.split():
        ip.ex("from %s import *" % m)

def execf(fname):
    """ Execute a file in user namespace """
    ip.ex('execfile("%s")' % os.path.expanduser(fname))

main()

import site
from os import environ
from os.path import join
from sys import version_info

if 'VIRTUAL_ENV' in environ:
    virtual_env = join(environ.get('VIRTUAL_ENV'),
                       'lib',
                       'python%d.%d' % version_info[:2],
                       'site-packages')
    site.addsitedir(virtual_env)
    print 'VIRTUAL_ENV ->', virtual_env
    del virtual_env
del site, environ, join, version_info

土  5月 08 10:22:57
ian@macbook-ian:~$ workon django-hgwebproxy
(django-hgwebproxy)土  5月 08 10:23:15
ian@macbook-ian:~$ ipython
VIRTUAL_ENV -> /home/ian/.virtualenvs/django-hgwebproxy/lib/python2.6/site-packages
Python 2.6.4 (r264:75706, Dec  7 2009, 18:45:15)
Type "copyright", "credits" or "license" for more information.

IPython 0.10 -- An enhanced Interactive Python.
?         -> Introduction and overview of IPython's features.
%quickref -> Quick reference.
help      -> Python's own help system.
object?   -> Details about 'object'. ?object also works, ?? prints more.

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