class Foo object def __hash__ self return foo Foo hash foo foo print f

  • Anonymous
  • Python console session
  • 17 Feb 2009 
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>>> class Foo(object):

...     def __hash__(self): return 1

... 

>>> foo = Foo()

>>> hash(foo)

1

>>> foo.a = 4

>>> print foo.a = 4

  File "<stdin>", line 1

    print foo.a = 4

                ^

SyntaxError: invalid syntax

>>> print foo.a

4

>>> d = {foo: 13}

>>> foo.a = 5

>>> d

{<__main__.Foo object at 0xb7da80cc>: 13}
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