Yes, and yes. There may be time still to fix the SystemError in 2.5.2! On Nov 14, 2007 11:16 AM, Mike Stall <[EMAIL PROTECTED]> wrote: > > > > > This is my first post, so here's a quick intro: I've recently joined the > IronPython team at Microsoft, after about 6 years as a developer on the the > .NET runtime (CLR). > > I'm currently trying to make IronPython match CPython's behavior regarding > some % format string to a level of detail not documented by the spec. > (http://docs.python.org/lib/typesseq-strings.html) > > While exploring to determine what CPython's behavior is, I'm hitting a > SystemError in CPython. > > Given the following snippet: > > class c(long): > def __oct__(self): > return '100' > > x=c(5) > oct(x) # expected to print 100 > '%o' % x # expected to use print '5' > > It looks like in CPython, '%o' uses __int__ and so it should ignore __oct__ > and print 5. > > However, I'm hitting an SystemError in CPython with this snippet: > > Python 2.5.1 (r251:54863, Apr 18 2007, 08:51:08) [MSC v.1310 32 bit (Intel)] > onwin32 > Type "help", "copyright", "credits" or "license" for more information. > >>> class c(long): > ... def __oct__(self): > ... return '100' > ... > >>> x=c(5) > >>> oct(x) # expected to print 100 > '100' > >>> '%o' % x # expected to use print '5' > Traceback (most recent call last): > File "<stdin>", line 1, in <module> > SystemError: \loewis\25\python\Objects\stringobject.c:4236: bad argument to > internal function > > Note that if c derives from 'int' instead of 'long', everything works as > expected. > > 1. Can somebody confirm that '%o' should not use __oct__ and that is uses > __int__ instead, and that the correct output from ('%o' % x) is indeed 5? > 2. Should I file a bug for the SystemError exception? > > Thanks, > Mike > http://blogs.msdn.com/jmstall > > > _______________________________________________ > Python-Dev mailing list > Python-Dev@python.org > http://mail.python.org/mailman/listinfo/python-dev > Unsubscribe: > http://mail.python.org/mailman/options/python-dev/guido%40python.org > >
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