[Python-bugs-list] [ python-Bugs-497005 ] __cmp__ method returns unexpected result

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Bugs item #497005, was opened at 2001-12-27 02:02
You can respond by visiting: 
http://sourceforge.net/tracker/?func=detail&atid=105470&aid=497005&group_id=5470

Category: Type/class unification
Group: Python 2.2
Status: Open
Resolution: None
Priority: 5
Submitted By: Matthew Russell (mattsurf76)
Assigned to: Nobody/Anonymous (nobody)
Summary: __cmp__ method returns unexpected result

Initial Comment:
There seems to be a problem overriding the __cmp__ 
metaclass method in the new release :

class A :
    def __init__(self, x, y)
        self.x=x
        self.y=y

    def __cmp__(self, other) :
        return (self.x==other.x and self.y==other.y)

a=A(1,2)
aa=A(1,2)

Where :
a==aa is false

and cmp(a,aa) is true?

this is also the behaviour if the __cmp__ method is 
*not* overriden, i.e

class Test :
  def __init__(self, *args) :
      self.args = args

aTest = Test(1)
aTest1 = Test(1)
aTest==aTest1 (returns 0)
cmp(aTest, aTest1) (returns 1)
Is this intended?

Python 2.2 (#28, Dec 21 2001, 12:21:22) [MSC 32 bit 
(Intel)] on win32

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