Question

I want to write my own __repr__ for some class that I define. I want it to be similar to the default <__main__.O object at 0x00D229D0>, except have a few other details in there. How do I reproduce that <__main__.O object at 0x00D229D0> thing?

Answer 1

See http://docs.python.org/reference/datamodel.html#object.repr

#!/usr/bin/env python
class O(object):
    def __repr__(self):
        return '<%s.%s object at 0x%x>'%(self.__module__,self.__class__.__name__,id(self))
o=O()
print(repr(o))

# <__main__.O object at 0xb7e7d0cc>