Is there a simple, elegant way to define singletons?
You have to use new-style classes (derive from object) for this.
design-patterns
elegant find sub-list in list
Given a list containing a known pattern surrounded by noise, is there an elegant way to get all items that equal the pattern. See below for my crude code.
Can you use a string to instantiate a class?
I’m using a Builder pattern in Python to separate a bunch of different configuration possibilities. Basically, I have a bunch of classes that are named ID... (e.g. ID12345). These all inherit from the base Builder class. In my script, I need to instantiate an instance for each class (about 50) every time this app runs. So, I’m trying to see if instead of doing something like this:
Python Observer Pattern: Examples, Tips?
However it does lack flexibility.
How to write Strategy Pattern in Python differently than example in Wikipedia?
In the 2009 Wikipedia entry for the Strategy Pattern, there’s a example written in PHP.
Python: is using “..%(var)s..” % locals() a good practice?
I discovered this pattern (or anti-pattern) and I am very happy with it.