[issue25548] Show the address in the repr for class objects

[ppperry]

ppperry added the comment:

I don't quite get why the memory address is helpful, but you could work around this using a custom metaclass:

    class IdMeta(type):
        def __repr__(cls):
            return super().__repr__()[:-1] + " at 0x%x>"%id(cls)
    class IdInRepr(metaclass=IdMeta):pass

`IdInRepr` and all its subclasses will then have the memory address in their representation:

  <class 'module.name' at address>

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nosy: +ppperry

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<http://bugs.python.org/issue25548>
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