guitar_chords.py

frets = 24
_notes = ["C","C#","D","D#","E","F","F#","G","G#","A","A#","B"] * int(frets/12 + 1)

def get_chord(n):
    current = _notes
    if n.find("m") == -1:
        key = "maj"
    else:
        key = "min"
        n = n.replace("m", "")

    p = _get_note_position(n)

    if key == "maj":
        notes = current[p], current[p + 4], current[p + 7]
    elif key == "min":
        notes = current[p], current[p + 3], current[p + 7]
    return notes

def _get_note_position(n):
    for i in range(12):
        if _notes[i] == n:
            return i
    return -1

def print_griff(notes="", tune="EBGDAE"):
    print("  |", end = "") 
    for i in range(1, frets + 1):
        print("___{}".format(i).ljust(5), end = "")
    print()
    
    for s in range(len(tune)):
        if notes == "":
            string = "{} | ".format(tune[s])
            for fret in range(frets):
                string += _snote(_notes[_get_note_position(tune[s]) + 1 + fret])
        else:
            if tune[s] in notes:
                string = "{} | ".format(tune[s])
            else:
                string = "{} | ".format(" ")
            for fret in range(frets):
                n = _notes[_get_note_position(tune[s]) + 1 + fret]
                if n in notes:
                    string += _snote(n)
                else:
                    string += _snote(" ")
        print(string)
    print()

def _snote(n):
    return "- {}".format(n).ljust(5)


if __name__ == "__main__":
    # chord = input("ger chord:")
    # print_griff(get_chord(chord))
    print_griff(["C", "A", "G", "E", "D"])