Iterating generator from C

[Sven Suursoho]

Mon, 15 May 2006 16:53:12 +0300, Christian Tismer <tismer at stackless.com>:

>>   I am working on project that has embedded python interpreter to run   
>> user-specified python procedures. Those procedures might return any   
>> iterable object with set of result data -- basically everything for  
>> which  iter() returns valid object (list, tuple, dict, iterator etc)
>>  It works ok, except generator under Python 2.4 with debugging enabled  
>> (see  
>> http://sourceforge.net/tracker/index.php?func=detail&aid=1483133&group_id=5470&atid=105470).
>>  Is there any way to rewrite following program to handle returned  
>> generator  without hitting this bug?
>
> I found this bug as well, and I think the fix should be
> back-ported.
> This problem can only show up when you are comiling a C
> extension, anyway.
> Why don't you just apply the fix and compile your own?
> It is just a wrong assertion, anyway.

Unfortunately, this is not an option because I can't control used  
environment: I'm trying to improve PostgreSQL's stored procedure language  
PL/Python and this software can be used everywhere.

At first I tried to block using generators if Py_DEBUG is defined. But  
this wouldn't work because of another, overlapping bug in Fedora Core 4's  
RPM packaging system (didn't check other versions) -- it disables Py_DEBUG  
but strips -DNDEBUG from compiler's command-line i.e. no Py_DEBUG and  
still active asserts().

See:
http://archives.postgresql.org/pgsql-patches/2006-05/msg00042.php
http://archives.postgresql.org/pgsql-patches/2006-05/msg00105.php


-- 
Sven Suursoho