pycalc_refactor.txt

High level plan: Change the calculator to a general purpose calculator that splits up input and uses python's builtin math tools.

Take in input
Split input on spaces
    Cast first and last parts as Ints
        If that doesn't work, return an error
Check for the operator in the middle piece of the input
If it's plus:
    Add the first and last parts and return the answer.
If it's minus:
    Subtract the first and last parts and return the answer.
If it's a "x":
    Multiply the first and last parts and return the answer.
If it's a "/":
    Divide the first part by the last part and return the answer.
If it's anything else,
    Return an error.