[Python-Dev] pickle output not unique

[Alexander Belopolsky]

2010/8/3 "Martin v. Löwis" <martin at v.loewis.de>:
..
> I think there are many other instances where values that compare equal
> pickle differently in Python.

Indeed.  For example:

>>> 1.0 == 1
True
>>> dumps(1.0) == dumps(1)
False

or for objects of the same type

>>> 0.0 == -0.0
True
>>> dumps(0.0) == dumps(-0.0)
False