Lukas Lueg <lukas.l...@gmail.com> added the comment:

Why not make the start-callback be able to return a boolean value to the 
gcmodule that indicates if garbage collection should take place or not.

For example, any value returned from the callback that evaluates to False (like 
null) will cause the module to evaluate any other callback and possibly collect 
garbage objects. Any value that evaluates to True (like True) returned from any 
callback causes all further callbacks to not be called and garbage collection 
not to take place now.

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nosy: +ebfe

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Python tracker <rep...@bugs.python.org>
<http://bugs.python.org/issue10576>
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