Michael Foord wrote:
Pickle on IronPython doesn't preserve sufficient information to unpickle
floats accurately:
CPython:
>>> a = 1 /3.0
>>> import cPickle as pickle
>>> pickle.loads(pickle.dumps(a)) == a
(Michael meant to say that this was True)
IronPython:
>>> import cPickle as pickle
>>> a = 1 /3.0
>>> pickle.loads(pickle.dumps(a)) == a
False
This is actually causing us numerical errors in Resolver One. CPython is
actually very careful about its string representation of floats so that
this is possible.
I think it's because IP cPickle is relying on the .NET Double.ToString
which isn't as truthful as cPython's repr.
The issue's covered here: http://www.python.org/doc/current/tut/node16.html
xtian
--
Christian Muirhead
Resolver Systems
[EMAIL PROTECTED]
We're hiring! http://www.resolversystems.com/jobs/
Resolver Systems Ltd
17a Clerkenwell Road, London EC1M 5RD, UK
VAT No.: GB 893 5643 79 Registered in England and Wales as company
number 5467329.
Registered address: 843 Finchley Road, London NW11 8NA, UK
_______________________________________________
Users mailing list
[email protected]
http://lists.ironpython.com/listinfo.cgi/users-ironpython.com
