1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
|
#!/usr/bin/env python
from ply import lex, yacc
# Tokenize (lex)
tokens = (
"NOTE_LENGTH",
"BASENOTE",
"ACCIDENTAL",
"REST",
"OCTAVE",
"CHORD_TYPE",
)
t_ignore = " |"
#t_BASENOTE = r"[A-Ga-g]"
t_BASENOTE = r"I+V?|VI*|i+v?|vi*"
t_ACCIDENTAL = r"\^{1,2}|_{1,2}|="
t_REST = r"z"
t_OCTAVE = r"'+|,+"
t_CHORD_TYPE = r"m|7|m7|0|o|\+|mb5|sus|sus4|maj7|mmaj7|7sus4|dim|dim7|7b5|m7b5|6|b6|m6|mb6|46|maj9|9|add9|7b9|m9"
def t_NOTE_LENGTH(t):
r"/?\d+"
multiplier = float(t.value.strip("/"))
if t.value.startswith("/"):
multiplier = 1/multiplier
t.value = multiplier
return t
def t_error(t):
raise TypeError("Unknown text '%s'" % (t.value,))
lex.lex()
#lex.input("GFG B'AB,, | g/2fg gab | GFG BAB | d2A AFD")
#s = "GFG B'AB,, | g/2fg gab | GFG BAB | d2A AFD"
s = "I IV V VI I"
#s = "GF_G,/2"
lex.input(s)
for tok in iter(lex.token, None):
print repr(tok.type), repr(tok.value)
# Parse (yacc)
class Note(object):
def __init__(self, value, duration=.25, octave=8):
self.value = value
self.duration = duration
self.octave = octave
self.accidental = None
def __repr__(self):
return "Note %s %s %s" % (self.value, self.duration, self.octave)
def p_pitch_list(p):
'''score : score note
'''
p[0] = p[1] + [p[2]]
def p_score(p):
'''score : note
'''
p[0] = [p[1]]
def p_note(p):
'''note : pitch
'''
p[0] = p[1]
def p_note_length(p):
''' note : note NOTE_LENGTH
'''
new_note = p[1]
new_note.duration = p[2]
p[0] = new_note
def p_accidental(p):
'''pitch : ACCIDENTAL pitch
'''
p[2].accidental = p[1]
p[0] = p[2]
|
>
>
|
|
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
|
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
|
#!/usr/bin/env python
from ply import lex, yacc
# Tokenize (lex)
tokens = (
"NOTE_LENGTH",
"BASENOTE",
"ACCIDENTAL",
"REST",
"OCTAVE",
"CHORD_TYPE",
"QUOTE",
)
t_ignore = " |"
#t_BASENOTE = r"[A-Ga-g]"
t_BASENOTE = r"I+V?|VI*|i+v?|vi*"
t_ACCIDENTAL = r"\^{1,2}|_{1,2}|="
t_REST = r"z"
t_OCTAVE = r"'+|,+"
t_CHORD_TYPE = r"m|7|m7|0|o|\+|mb5|sus|sus4|maj7|mmaj7|7sus4|dim|dim7|7b5|m7b5|6|b6|m6|mb6|46|maj9|9|add9|7b9|m9"
t_QUOTE = '"'
def t_NOTE_LENGTH(t):
r"/?\d+"
multiplier = float(t.value.strip("/"))
if t.value.startswith("/"):
multiplier = 1/multiplier
t.value = multiplier
return t
def t_error(t):
raise TypeError("Unknown text '%s'" % (t.value,))
lex.lex()
#lex.input("GFG B'AB,, | g/2fg gab | GFG BAB | d2A AFD")
#s = "GFG B'AB,, | g/2fg gab | GFG BAB | d2A AFD"
s = '''I IV V VI I "I" "ii"'''
#s = "GF_G,/2"
lex.input(s)
for tok in iter(lex.token, None):
print repr(tok.type), repr(tok.value)
# Parse (yacc)
class Note():
def __init__(self, value, duration=.25, octave=8):
self.value = value
self.duration = duration
self.octave = octave
self.accidental = None
def __repr__(self):
return "Note %s %s %s" % (self.value, self.duration, self.octave)
class Chord():
def __init__(self, value, duration=.25, chord_type="major"):
self.value = value
self.duration = duration
self.chord_type = chord_type
def __repr__(self):
return "Chord %s %s %s" % (self.value, self.duration, self.chord_type)
def p_pitch_list(p):
'''score : score note
score : score chord
'''
p[0] = p[1] + [p[2]]
def p_score(p):
'''score : note
score : chord
'''
p[0] = [p[1]]
def p_note(p):
'''note : pitch
'''
p[0] = p[1]
def p_note_length(p):
''' note : note NOTE_LENGTH
'''
new_note = p[1]
new_note.duration = p[2]
p[0] = new_note
def p_chord(p):
'''chord : QUOTE pitch QUOTE
| QUOTE pitch CHORD_TYPE QUOTE
'''
p[0] = Chord(value=p[2].value)
if len(p) > 3:
p[0].chord_type = p[3]
def p_accidental(p):
'''pitch : ACCIDENTAL pitch
'''
p[2].accidental = p[1]
p[0] = p[2]
|