Name: [3253] gasto
Member: 85 months
Authored: 41 videos
Description: C/C++ and python programmer. Some knowledge of graphic design too. Interested in Game Artificial Intelligence and Artificial Life. Currently studying(by myself)too many things to be worth the mention. Happy to contribute to the 'help-without-compensation-asked' community. I hope every one that r ...

Garbage Collection in Python - Part I - [ID:1431] (3/4)

in series: Python from zero.

video tutorial by gasto, added 05/09

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We view an animated illustration of how the garbage collector collects objects under Python 3.0 . That is, two referrers are created by being associated to the Foo class instance, and the Foo class instance itself its created when at least one referrer is left, destroyed when no referrers to it are left. the weakref being associated to the Foo instance, at the end of the animation, is not accounted for the reference count (as seen in the refcount counter at the top-right side of the animation). I type in the class Foo that we will be using in further videos, to explain garbage collection.

Note : the class created here is not intended for any practical purpose. It is just of use for the exercise on learning the concepts behind garbage collection in Python.

class Foo(object):
  def __init__(self):
    self.attribute = None
    print("created")
  def __del__(self):
    print("destructed")
  def store_attribute(self,obj):
    self.attribute = obj
  def output_attribute(self):
    print(self.attribute)

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  • Published: 67 months ago

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It's gud for me..


It will not work on Python 2.x only on Python 3.0 because some Python 3.0 exclusive syntax is used.


12. Chris Brown Thu, 03 Jun 2010 20:09

Didn't work on python 2.6.5


Kind of sucked. The musical introduction was longer than the instruction.


There´s a download button for slow internet connection users.


Nice video for beginners !


7. anonymous Sat, 02 Jan 2010 11:55

what is going on with video 3 of this series?!?! So painful! I have a slow connection and could only endure the buffering of the first 40 seconds. Is there any actual instruction after that point?


6. anonymous Fri, 18 Sep 2009 11:24

To the point, nice


A nice starter...


The video is not more advanced, it is simply less practical and more into the core.

I thought it was necessary, because beginners tend to get confused about what an actual variable is in Python. And knowing it is extremely important from the beginning.

The animation is not winning any prizes. But hopefully will help you understand the concept of garbage collection. It runs two times, the first time without the weak reference. The second time with the weak reference.


3. anonymous Sat, 06 Jun 2009 23:57

Going from your 2nd tutorial to your 3rd.... this one requires WAY more programming knowlege already.

Also the intro animation is way too long. It's charmingly bad, but why play it twice?


You are right, I should clarify at least in the description that the Python class is not meant to do anything useful. It was created just for education/experimentation purposes.


Thank you, I'm still working out how to use Python and am very much a beginner, not really sure what the program was meant to be doing


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Kudos and Thanks for gasto

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