def __isub__(self, other):
        """Subtract items from bag.

        >>> b = Bag.fromkeys("abacab")
        >>> b -= "cccccab"
        >>> print(b)
        {'a': 2, 'b': 1}
        """
        if isinstance(other, dict):
            other = IntegerBag(other) * (-1)
        self.update(other, -1)
        return self
Subtract items from bag.

        >>> b = Bag.fromkeys("abacab")
        >>> b -= "cccccab"
        >>> print(b)
        {'a': 2, 'b': 1}
        
recipes/Python/578612_Counter_class/recipe-578612.py