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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:

def _teardown(self):
        '''
        Put the original method back in place. This will also handle the
        special case when it putting back a class method.

        The following code snippet best describe why it fails using settar,
        the class method would be replaced with a bound method not a class
        method.

        >>> class Example(object):
        ...     @classmethod
        ...     def a_classmethod(self):
        ...         pass
        ...
        >>> Example.__dict__['a_classmethod']
        <classmethod object at 0x7f5e6c298be8>
        >>> orig = getattr(Example, 'a_classmethod')
        >>> orig
        <bound method type.a_classmethod of <class '__main__.Example'>>
        >>> setattr(Example, 'a_classmethod', orig)
        >>> Example.__dict__['a_classmethod']
        <bound method type.a_classmethod of <class '__main__.Example'>>

        The only way to figure out if this is a class method is to check and
        see if the bound method im_self is a class, if so then we need to wrap
        the function object (im_func) with class method before setting it back
        on the class.
        '''
        # Figure out if this is a class method and we're unstubbing it on the
        # class to which it belongs. This addresses an edge case where a
        # module can expose a method of an instance. e.g gevent.
        if hasattr(self._obj, '__self__') and \
                inspect.isclass(self._obj.__self__) and \
                self._obj.__self__ is self._instance:
            setattr(
                self._instance, self._attr, classmethod(self._obj.__func__))
        elif hasattr(self._obj, 'im_self') and \
                inspect.isclass(self._obj.im_self) and \
                self._obj.im_self is self._instance:
            # Wrap it and set it back on the class
            setattr(self._instance, self._attr, classmethod(self._obj.im_func))
        else:
            setattr(self._instance, self._attr, self._obj)