My stuff

Stubbing out open() in Python

Administrator — Tue, 15 May 2012 20:16:52 +0000

Here’s an example that stubs out the open() function in Python using the mock library.

from StringIO import StringIO

from mock import patch

# We are testing these 2 functions :

def read_sys():
    f = open('/sys/something')
    data = f.readline().strip()
    f.close()
    return data

def read_dev():
    f = open('/dev/something')
    data = f.readline().strip()
    f.close()
    return data

# Test helper function

def side_effect_function(path):
    if path.startswith('/sys/something'):
        return StringIO('abcd')
    if path.startswith('/dev/something'):
        return StringIO('zyxw')

# Actual test, this would be in a testcase for a real unit test

with patch('__builtin__.open') as mocked_open:
     mocked_open.side_effect = side_effect_function

     data = read_sys()
     assert data == 'abcd'
     data = read_dev()
     assert data == 'zyxw'

With this kind of mock object you don’t have to create temporary files just for the test.

Uruguay

Administrator — Sat, 21 Apr 2012 16:08:24 +0000

Here are some photos from a trip to Urugyay :

Correlation or causation

Administrator — Tue, 13 Dec 2011 09:59:22 +0000

Statistics are easy :

http://www.businessweek.com/magazine/correlation-or-causation-12012011-gfx.html

Yorkshire Sculpture Park

Administrator — Sun, 09 Oct 2011 15:43:05 +0000

Here are some photos from the Yorkshire Sculpture Park :

Cool Python

Administrator — Sun, 09 Oct 2011 15:33:36 +0000

Check out the example in the 3rd comment :

http://code.activestate.com/recipes/413137-call-a-functionmethod-x-times-per-second/

That is cool.

Egypt

Administrator — Sat, 07 May 2011 20:20:14 +0000

I went on a great trip to Egypt. First there was a cruise on the Nile and then a visit to Cairo. Click on Abu Simbel to see the pictures.

Revolution

Administrator — Thu, 03 Mar 2011 11:35:33 +0000

The picture below should be on posters and T-shirts. I would definitely buy them.

Banksy’s take on Star Wars

Administrator — Wed, 16 Feb 2011 11:08:03 +0000

Apparently Banksy put this Star Wars parody up in Melbourne in Australia. Funny.

Holiday time

Administrator — Sat, 13 Nov 2010 19:59:34 +0000

My big holiday this year was to the US. Firstly I took a boat from Southampton to New York. Then a train from NY to Boston. And lastly a plane took me to Toronto. The weather was great, except on the boat. Boston and Toronto are very nice cities well worth a visit.

Here are the pictures :

Leeds Castle

Administrator — Sun, 19 Sep 2010 18:35:30 +0000

Here are some photos from a visit to Leeds Castle, Canterbury Cathedral and Audley End :

Canterbury Cathedral gate

Click on the picture to see them.