How to use the sure.core.DeepComparison function in sure

def deep_equals(self, dst):
        deep = DeepComparison(self._src, dst)
        comparison = deep.compare()
        if isinstance(comparison, bool):
            return comparison

        raise comparison.as_assertion(self._src, dst)

msg = "X{0} does not have the key {1!r} whereas Y{2} has it".format(
                red(c.current_X_keys),
                safe_repr(diff_y[0]),
                green(c.current_Y_keys))
            return DeepExplanation(msg)

        elif X == Y:
            return True

        else:
            for key_X in x_keys:
                self.key_X = key_X
                self.key_Y = key_X
                value_X = X[key_X]
                value_Y = Y[key_X]
                child = DeepComparison(
                    value_X,
                    value_Y,
                    epsilon=self.epsilon,
                    parent=self,
                ).compare()
                if isinstance(child, DeepExplanation):
                    return child

def equal(self, what, epsilon=None):
        """compares given object ``X``  with an expected ``Y`` object.

        It primarily assures that the compared objects are absolute equal ``==``.

        :param what: the expected value
        :param epsilon: a delta to leverage upper-bound floating point permissiveness
        """

        try:
            comparison = DeepComparison(self.obj, what, epsilon).compare()
            error = False
        except AssertionError as e:
            error = e
            comparison = None

        if isinstance(comparison, DeepExplanation):
            error = comparison.get_assertion(self.obj, what)

        if self.negative:
            if error:
                return True

            msg = '%s should differ from %s, but is the same thing'
            raise AssertionError(msg % (safe_repr(self.obj), safe_repr(what)))

        else:

def compare_iterables(self, X, Y):
        len_X, len_Y = map(len, (X, Y))
        if len_X > len_Y:
            msg = "X has {0} items whereas Y has only {1}".format(len_X, len_Y)
            return DeepExplanation(msg)
        elif len_X < len_Y:
            msg = "Y has {0} items whereas X has only {1}".format(len_Y, len_X)
            return DeepExplanation(msg)
        elif X == Y:
            return True
        else:
            for i, (value_X, value_Y) in enumerate(zip(X, Y)):
                self.key_X = self.key_Y = i
                child = DeepComparison(
                    value_X,
                    value_Y,
                    epsilon=self.epsilon,
                    parent=self,
                ).compare()
                if isinstance(child, DeepExplanation):
                    return child