Oct 12, 2015 · Classes are the pillar of Object Oriented Programming. OOP is highly concerned with code organization, reusability, and encapsulation. First, a disclaimer: OOP is partially in …

Sep 22, 2010 · The standard Python libraries for encoding Python into JSON, such as the stdlib’s json, simplejson, and demjson, can only handle Python primitives that have a direct JSON …

# Python 3 style: class ClassWithTitle(object, metaclass = TitleMeta): # Your class definition... It's a bit weird to define this metaclass as we did above if we'll only ever use it on the single class. …

This is because Python has proper multiple inheritance, and also ducktyping, which means that the places where you must have interfaces in Java, you don't have to have them in Python. …

Nov 24, 2013 · For example - i'm now workin with code, whcih will have really lot of variables (about 20), which must be used in lot of functions && classes && methods. So - why it's bad - …

Dec 17, 2013 · Organizing the exception classes in a separate module (e.g. exceptions.py) is generally a good idea. To create a specific exception, subclass the base exception class. class …

Nov 30, 2012 · Use the abc module to create abstract classes. Use the abstractmethod decorator to declare a method abstract, and declare a class abstract using one of three ways, depending …

To make your items sortable, they only need to implement __lt__. That's the only method used by the built in sort. The other comparisons or functools.total_ordering are only needed if you …

In Python, everything is an object: [] (a list) is an object 'abcde' (a string) is an object; 1 (an integer) is an object; MyClass() (an instance) is an object; MyClass (a class) is also an object; …

Aug 2, 2011 · To make classes comparable, you only need to implement __lt__ and decorate the class with functools.total_ordering. You should also provide an __eq__ method if possible. …