[Python-Dev] Object creation hook (original) (raw)

Steve Holden steve at holdenweb.com
Tue Jan 23 23🔞02 CET 2007

Kristján V. Jónsson wrote:

Hello there.

I am trying to insert a hook into python enabling a callback for all just-created objects. The intention is to debug and find memory leaks, e.g. by having the hook function insert the object into a WeakKeyDictionary. I have already added a method to “object” to set such a hook, and “objectnew” now calls it upon completion, but this is far from covering all places. Initially, I thought objectinit were the place, but almost no classes call object.init from their init method. Then there is the separate case of old-style classes. I suppose there's no requirement on C-defined types to actually call object_new, so you will need to audit them and make sure they do.

PyClass_New in classobject.c is another obvious place - the creation of old-style instances doesn't appear to involve object_new.

Any suggestions on how to do a global object creation hook in python? Nothing other than the above.

regards Steve

Steve Holden +44 150 684 7255 +1 800 494 3119 Holden Web LLC/Ltd http://www.holdenweb.com Skype: holdenweb http://del.icio.us/steve.holden Blog of Note: http://holdenweb.blogspot.com

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