How to convert value to defined number?

[philipbergwerf]

I am making a program that prints a piano-keyboard-diagram on the screen based on the input. I want to use text input using the 'music tracker' standard.

The example below is a basic C chord.

# User input
rightNotes = "C4 E4 G4 C5"
leftNotes = "C2 C3"
# Convert user input to numbers
rightHandNumbers = []  # Notes for the right hand
leftHandNumbers = []  # Notes for the left hand

The rightNotes and leftNotes need to be converted to numbers to rightHandNumbers and leftHandNumbers. The numbers are the piano-key-numbers(1-88). C4=(key)40, E4=44, G4=47, C5=52, C2=16, C3=28

I don't know how to do this(I think this is how to solve the problem):

1. Making a function that cuts the rightNotes string by spaces into different values.
   
2. Making a function that converts the separated values into the given numbers.
   

Does someone have idea's?

The conversion table looks like this for only the central octave:
C4=40
c4=41
D4=42
d4=43
E4=44
F4=45
f4=46
G4=47
g4=48
A4=49
a4=50
B4=51