calculator.py

#!/usr/bin/env python3
"""
This program lets you create a simple command line calculator without using
the 'if..else' construct. It uses built-in 'operator' module to accomplish the
same

Created with help of an answer on stackoverflow. Don't have the exact link.
"""

import operator
ops = {
    "+": operator.add,
    "-": operator.sub,
    "/": operator.truediv,
    "*": operator.mul
}

x = input("Enter an operator [OPTIONS: +, -, *, /]: ")
y = int(input("Enter number: "))
z = int(input("Enter number: "))

print (ops[x](y, z))