Method pop

recipes/Python/259179_deque_collection_class/recipe-259179.py:22–28

(self)

            self.pop()      
        
    def pop(self):
        if self.left == self.right:
            raise IndexError('cannot pop from empty deque')
        self.right -= 1
        elem = self.data[self.right]
        del self.data[self.right]         
        return elem
    
    def popleft(self):
        if self.left == self.right: