Merge many text files to one

import glob

search_pattern = '*.vcf'
dest_file = '__.txt'

with open(dest_file, 'w') as F:
    for infile in glob.glob(search_pattern):
        with open(infile) as f:
            F.write(f.read())
            F.write("\n\n")

print 'All done'
raw_input('Press enter...')

Run GAE SDK for Python and Django on Ubuntu Maverick

First, I make the following structure in my project's directory:
~/projects/gae/ - directory for GAE's projects
~/projects/gae/google_appengine/ - downloaded GAE sources
~/projects/gae/google_appengine/test/ - test project using GAE

So, to run this test project as well as other further projects that use GAE

1. Download Google App Engine SDK for Python and unpack it to ~/projects/gae/.
   
2. Install python-2.5
   

   sudo add-apt-repository ppa:fkrull/deadsnakes
   sudo apt-get update
   sudo apt-get install python2.5
   

3. Install easy_install for Python 2.5
   

   cd /tmp
   wget http://pypi.python.org/packages/2.5/s/setuptools/setuptools-0.6c11-py2.5.egg
   sh setuptools-0.6c11-py2.5.egg
   

4. Install Django 1.1 for Python 2.5
   

   easy_install-2.5 django==1.1.1
   

5. Put into ~/projects/gae/google_appengine/test file
   

   echo "#!/bin/bash
   
   python2.5 ../google_appengine/dev_appserver.py ./" > run
   chmod a+x run
   

When you need to run development server for the Test project you should do

cd ~/projects/gae/google_appengine/test/
./run

Default opening software

This file ~/.local/share/applications/mimeapps.list contains all overridden openers for particular MIME types.

Google Chrome and Flash player

Having installed new Ubuntu 10.10 I found that Google Chrome cannot display flash content and asks to install flash player. But at flash player download website it says that I have already installed one.
Googling a bit gives me an advise. I made the step below and it gets work.

$ sudo apt-get install flashplugin-installer
$ sudo locate libflashplayer.so
/usr/lib/flashplugin-installer/libflashplayer.so
/usr/share/ubufox/plugins/npwrapper.libflashplayer.so
/var/lib/flashplugin-installer/npwrapper.libflashplayer.so
$ ln -s libflashplayer.so /usr/lib/flashplugin-installer/libflashplayer.so

Clock widget hangup

If you are very annoyed by system hangup when you have clicked clock widget to watch calendar or whatever in your Ubuntu 10.10 I can advise to do the following:

sudo apt-get purge evolution-data-server evolution-couchdb evolution evolution-exchange

That's all. After this you are avoided such unpleasant behavior.
It, however, removes Evolution mail client but if you don't use it as me that is not a problem.