ijo_suna

# Guitar Shift 0.1
# This program displays the same note on all the strings of the guitar.

from sys import argv

usage = """
Usage: python guitar_shift.py [string] [fret]
Example: python guitar_shift.py 1 3 -- first string, third fret
"""

# Standard tuning: E B G D A E
tuning = {
    1: 5,
    2: 12,
    3: 8,
    4: 3,
    5: 10,
    6: 5,
}
# Number of frets on the guitar
frets = 24

try:
    given_string = int(argv[1])
    given_fret = int(argv[2])
except (TypeError, ValueError, IndexError):
    exit(usage)
if not tuning.has_key(given_string):
    exit('Error: unknown string.')
if not (0 <= given_fret <= frets):
    exit('Error: no such fret.')

given_note = tuning[given_string] + given_fret
while given_note >= 12:
    given_note -= 12

for string in tuning:
    # first position on the string -- could be negative, not used if so
    fret = given_note - tuning[string]
    if fret >= 0:
        string_frets = [(given_note - tuning[string])]
    else:
        string_frets = []
    while fret <= (frets - 12):
    fret += 12
        string_frets += [fret]
    print "%i:" % (string), string_frets