Use a dictionary and function pointers as a substitute for switch/case.

Signatures:

None

Examples:

import operator

def apply_operation(left_operand, right_operand, operator):
    import
    op_map = {
        '+': operator.add,
        '-': operator.sub,
        '*': operator.mul,
        '/': operator.truediv
        }

    return op_map[operator](left_operand, right_operand)