Can/should I implement Python methods by assignment to attributes?

Question

Is there any stylistic taboo or other downside to implementing trivial methods by assignment to class attributes? E.g. like bar and baz below, as opposed to the more ususal foo.

class MyClass(object):
    def hello(self):
        return 'hello'
    def foo(self):
        return self.hello()
    bar = lambda self: self.hello()
    baz = hello

I find myself tempted by the apparent economy of things like this:

__str__ = __repr__ = hello

Answer 1

Personally, I think things like

__str__ = __repr__ = hello

are fine, but

bar = lambda self: self.hello()

is evil. You cannot easily give a lambda a docstring, and the .func_name attribute will have the meaningless value <lambda>. Both those problems don't occur for the first line.