fretboard.md

Open	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24
E	F	F#/Gb	G	G#/Ab	A	A#/Bb	B	C	C#/Db	D	D#/Eb	E	F	F#/Gb	G	G#/Ab	A	A#/Bb	B	C	C#/Db	D	D#/Eb	E
B	C	C#/Db	D	D#/Eb	E	F	F#/Gb	G	G#/Ab	A	A#/Bb	B	C	C#/Db	D	D#/Eb	E	F	F#/Gb	G	G#/Ab	A	A#/Bb	B
G	G#/Ab	A	A#/Bb	B	C	C#/Db	D	D#/Eb	E	F	F#/Gb	G	G#/Ab	A	A#/Bb	B	C	C#/Db	D	D#/Eb	E	F	F#/Gb	G
D	D#/Eb	E	F	F#/Gb	G	G#/Ab	A	A#/Bb	B	C	C#/Db	D	D#/Eb	E	F	F#/Gb	G	G#/Ab	A	A#/Bb	B	C	C#/Db	D
A	A#/Bb	B	C	C#/Db	D	D#/Eb	E	F	F#/Gb	G	G#/Ab	A	A#/Bb	B	C	C#/Db	D	D#/Eb	E	F	F#/Gb	G	G#/Ab	A
E	F	F#/Gb	G	G#/Ab	A	A#/Bb	B	C	C#/Db	D	D#/Eb	E	F	F#/Gb	G	G#/Ab	A	A#/Bb	B	C	C#/Db	D	D#/Eb	E

guitar_fretboard.py

import csv


TWELVE_NOTES = ["C", "C#/Db", "D", "D#/Eb", "E", "F", "F#/Gb", "G", "G#/Ab", "A", "A#/Bb", "B"]
OPEN_STRING_NOTES = ["E", "B", "G", "D", "A", "E"]
N_FRETS = 24


def generate_fretboard_matrix():
    mat = []
    headers = ["Open"] + [str(i) for i in range(1, N_FRETS + 1)] 
    mat.append(headers)
    for string_note in OPEN_STRING_NOTES:
        fst_idx = TWELVE_NOTES.index(string_note)
        row = [TWELVE_NOTES[(fst_idx + i) % len(TWELVE_NOTES)] for i in range(N_FRETS + 1)]
        mat.append(row)
    return mat


class MarkDownTable:
    """
    https://github.com/lzakharov/csv2md/blob/master/csv2md/table.py
    """
    def __init__(self, cells):
        self.cells = cells
        self.widths = list(map(max, zip(*[list(map(len, row)) for row in cells])))

    def markdown(self, center_aligned_columns=None, right_aligned_columns=None):
        def format_row(row):
            return '| ' + ' | '.join(row) + ' |'

        rows = [format_row([cell.ljust(width) for cell, width in zip(row, self.widths)]) for row in self.cells]
        separators = ['-' * width for width in self.widths]

        if right_aligned_columns is not None:
            for column in right_aligned_columns:
                separators[column] = ('-' * (self.widths[column] - 1)) + ':'
        if center_aligned_columns is not None:
            for column in center_aligned_columns:
                separators[column] = ':' + ('-' * (self.widths[column] - 2)) + ':'

        rows.insert(1, format_row(separators))

        return '\n'.join(rows)


def main():
    print(MarkDownTable(generate_fretboard_matrix()).markdown())
    

if __name__ == "__main__":
    main()