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How to find all the subclasses of a class given its name?
I need a working approach of getting all classes that are inherited from a base class in Python.
10 Answers
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What is the __del__ method, How to call it?
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__del__ is a finalizer. It is called when an object is garbage collected which happens at some point after all references to the object have been deleted.
In a simple case this could be right after you say del x or, if x is a local variable, after...
__proto__ VS. prototype in JavaScript
...e is the object that is used to build __proto__ when you create an object with new:
( new Foo ).__proto__ === Foo.prototype;
( new Foo ).prototype === undefined;
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Build a Basic Python Iterator
How would one create an iterative function (or iterator object) in python?
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filename and line number of python script
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edited Jan 4 at 13:53
Yash
5388 bronze badges
answered Jun 16 '10 at 18:52
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__lt__ instead of __cmp__
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Yep, it's easy to implement everything in terms of e.g. __lt__ with a mixin class (or a metaclass, or a class decorator if your taste runs that way).
For example:
class ComparableMixin:
def __eq__(self, other):
return not ...
How to invoke the super constructor in Python?
In all other languages I've worked with the super constructor is invoked implicitly. How does one invoke it in Python? I would expect super(self) but this doesn't work.
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How to retrieve a module's path?
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edited Aug 15 '19 at 11:13
Roman Orac
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Confused about __str__ on list in Python [duplicate]
...t uses str(); printing a list containing an object uses str() for the list itself, but the implementation of list.__str__() calls repr() for the individual items.
So you should also overwrite __repr__(). A simple
__repr__ = __str__
at the end of the class body will do the trick.
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Is there a Python caching library?
...me Page
Caching Documentation
Good quick-start article about using Beaker with Django (but useful in any other apps too)
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