[IronPython] CPickle problem

Michael Foord fuzzyman at voidspace.org.uk
Mon Feb 15 17:16:35 CET 2010

On 15/02/2010 16:04, Dino Viehland wrote:
> This works if you run with the --X:Frames option.  This is because 
> namedtuple is using sys._getframe to find the calling module name and 
> setting it on the created class.  Alternately you could do this yourself:
> Point.__module__ = __name__
> You could file a bug on this on CodePlex but to fix it we probably 
> need to modify the standard library and provide an alternate 
> namedtuple implementation which doesn't require sys._getframe.
Could the namedtuple API be changed to better support IronPython - 
perhaps an optional __module__ argument?


> *From:* users-bounces at lists.ironpython.com 
> [mailto:users-bounces at lists.ironpython.com] *On Behalf Of *Don Sawatzky
> *Sent:* Monday, February 15, 2010 7:41 AM
> *To:* users at lists.ironpython.com
> *Subject:* [IronPython] CPickle problem
> This assert works in CPython 2.6 and not in IronPython 2.6.1 RC 1 with 
> a failure
> in dumps():
> from collections import namedtuple
> # verify that instances can be pickled
> from cPickle import loads, dumps
> Point = namedtuple('Point', 'x, y', False)
> p = Point(x=10, y=20)
> assert p == loads(dumps(p))
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> Users at lists.ironpython.com
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