note_conversions.py

"""
given valid notes this returns their correct midi integer value
given "off" or "---" will return -1 and -2 respectively
given any other input will return -3

"""

def notetoi(strlong_in):
    """ note string to midi integer """

    def to_note(str_in, oct_in):
        """ further parsing of note input """
        if (oct_in < 0 or oct_in > 10): return -1

        str_in = str_in.replace('-', '')
        notes_list = ["C","C#","D","D#","E","F","F#","G","G#","A","A#","B"]
        
        # note must be in this list, else return -1 at the end
        for i, note in enumerate(notes_list):
            if str_in == note:
                return (i + oct_in * 12)

    if not strlong_in.lower() == "off":
        if strlong_in == "---":
            return -2
        str_in, oct_in = strlong_in[:2], int(strlong_in[-1])
        return to_note(str_in, oct_in)

    # if reaches here, it's not recognized as a valid note
    return -3