code: def operate(self, left, right, operation):
          
          operation = {
              '+': operator.add,
              '-': operator.sub,
              '*': operator.mul,
              '/': operator.truediv
          }.get(operation)
          return operation(left, right)
docs: Do operation on colors
          args:
              left (str): left side
              right (str): right side
              operation (str): Operation
          returns:
              str