python - How to alter print behavior for an object in python

Question

I have my unique class I created and i wish to control the output of some flow..e.g:

obj = MyObject()
print obj

so instead of what python does, I want to alter the output. how do I do such a thing?

Answer 1

改变__str__方法

class MyObject(object):
    def __str__(self):
        return 'foo'


>>> print MyObject()
foo

Answer 2

您可以覆盖__str__和__repr__。