Imagine you have the following code def do_something(): users = User.objects.filter(dob__gte='1980-01-01') for user in users: # do something to user If you were writing unit test against do_something(), you would need to do some complex mocking on User.objects.filter() to return some mock up data. But this can be easily prevented by refactoring into a separate… Read More »
import os, sys, pathlib # if script is in on 1 level deep # sys.path.append(str(pathlib.Path(__file__).parents[1].absolute())) sys.path.append(str(pathlib.Path(__file__).absolute())) os.environ.setdefault("DJANGO_SETTINGS_MODULE", "main.settings") import django django.setup() # import your django models # do your django work
Consider the following code import logging logging.info('trying to log something') Executing above: It won’t log anything to console, because it default to level warning It won’t log anything to console, because no stream has been set import logging logging.basicConfig(level=logging.INFO) logging.info('trying to log something') logging.basicConfig(level=logging.DEBUG) logging.debug('trying to log something debug') Executing above: Running basicConfig(…) default adds… Read More »
I have been writing python OO for a while and every time when I create a method, I always ask myself, should this be instance method or staticmethod (or classmethod)? As you might already aware that the difference between instance method and static method is that static method doesn’t have access to the instance, same… Read More »
http://blog.codepipes.com/testing/software-testing-antipatterns.htm The above article talks about some anti-patterns in tests, personally I agree most of them especially anti-pattern on “Treating TDD as a religion”.
A very nice video illustrating how CPU works.
A very nice video laying the fundamental of logic boards.
“In our industry, every technology generates what I call a “galaxy.” These galaxies feature stars but also black holes; meteoric changes that fade in the night, many planets, only a tiny fraction of which harbour some kind of life, and lots of cosmic dust and dark matter. Examples of galaxies are, for example, .NET, Cocoa, Node.js,… Read More »
Just a note to myself that when multiple keys added ssh agent, the key at the top of the keychain needs to be the bitbucket one, as it won’t try all the keys.
The graph below is the connection graph on Orcon VDSL, see the arrow pointed regular connection drops, it is particularly obvious during online gaming. The graph below is the connection graph tethered on my phone on 3G Mobile Data, comparing to above, a lot less connection drops.