environment/lib/python2.7/site-packages/IPython/config/configurable.py
def _walk_mro(cls):
        """Walk the cls.mro() for parent classes that are also singletons

        For use in instance()
        """

        for subclass in cls.mro():
            if issubclass(cls, subclass) and \
                    issubclass(subclass, SingletonConfigurable) and \
                    subclass != SingletonConfigurable:
                yield subclass
def _walk_mro(cls):
        """Walk the cls.mro() for parent classes that are also singletons

        For use in instance()
        """

        for subclass in cls.mro():
            if issubclass(cls, subclass) and \
                    issubclass(subclass, SingletonConfigurable) and \
                    subclass != SingletonConfigurable:
                yield subclass
def _walk_mro ( cls ) : for subclass in cls . mro ( ) : if issubclass ( cls , subclass ) and issubclass ( subclass , SingletonConfigurable ) and subclass != SingletonConfigurable : yield subclass
Walk the cls.mro() for parent classes that are also singletons

        For use in instance()
Walk the cls . mro () for parent classes that are also singletons