spiffyscore

Check-in [bd456efa03]
Login

Check-in [bd456efa03]

Overview
Comment:Now parses notes, accidentals, and octaves
Timelines: family | ancestors | descendants | both | ply
Files: files | file ages | folders
SHA1: bd456efa03f4f52e38da72ce601bbb6c8b27aea8
User & Date: spiffytech@gmail.com on 2010-11-16 08:29:29.000
Other Links: branch diff | manifest | tags
Context
2010-11-16
08:36
Now parses note duration check-in: dc8bbfb68e user: spiffytech@gmail.com tags: ply
08:29
Now parses notes, accidentals, and octaves check-in: bd456efa03 user: spiffytech@gmail.com tags: ply
2010-11-13
08:28
Added basic ABC tokenizing via the PLY module check-in: ff84293301 user: spiffytech@gmail.com tags: ply
Changes
Unified Diff Ignore Whitespace Patch
Modified parse.py from [17628fda61] to [b5bfbaf68d]. 
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























































































#!/usr/bin/env python

from ply import lex, yacc


tokens = (

    "NOTE",

    "REST",
    "SHARP",
    "FLAT",
    "OCTAVE",
    "NATURAL",
    "LENGTH",
)

t_NOTE = r"[A-Ga-g]"

t_REST = r"z"
t_SHARP = r"\^"
t_FLAT = r"_"
t_NATURAL = r"="
t_OCTAVE = r"'+|,+"


def t_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,))

t_ignore = " |"

lex.lex()

lex.input("GFG B'AB,, | g/2fg gab | GFG BAB | d2A AFD")



for tok in iter(lex.token, None):
    print repr(tok.type), repr(tok.value)



























































































>

>
|
>

<
<

<
|


|
>

<
<
<

>

|














|
>
>
>


>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>

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
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127

#!/usr/bin/env python

from ply import lex, yacc

# Tokenize (lex)
tokens = (
    "NOTE_LENGTH",
    "BASENOTE",
    "ACCIDENTAL",
    "REST",


    "OCTAVE",

    "CHORD_TYPE",
)

t_BASENOTE = r"[A-Ga-g]"
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,))

t_ignore = " |"

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 = "GF_G,"
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
    def __repr__(self):
        return "Note %s %s %s" % (self.value, self.duration, self.octave)

#def p_element(p):
#    "element : note_element"
#    p[0] = p[1]
#
#def p_note_element(p):
#    '''note_element : note_element note_stem
#                     | note_stem
#    '''
#    p[0] = p[1]
#
#def p_note_stem(p):
#    '''note_stem : note'''
#    p[0] = p[1]
#
#def p_note(p):
#    '''note : note_or_rest
#            | note_or_rest NOTE_LENGTH
#    '''
#    p[0] = p[1]
#
#def p_note_or_rest(p):
#    '''note_or_rest : pitch
#                    | REST
#    '''
#    p[0] = p[1]
#
#def p_pitch(p):

def p_pitch_list(p):
    '''score : score pitch
    '''
    p[0] = p[1] + [p[2]]

def p_sore(p):
    '''score : pitch
    '''
    p[0] = [p[1]]


def p_pitch_more(p):
    ''' score : pitch NOTE_LENGTH
    '''
    print "stuff"
    new_note = p[1]
    new_note.duration = p[2]
    p[0] = new_note

def p_pitch(p):
    '''pitch : BASENOTE
    '''
    p[0] = Note(p[1])

def p_accidental(p):
    '''pitch : ACCIDENTAL pitch
    '''
    p[2].accidental = p[1]
    p[0] = p[2]

def p_octave(p):
    '''pitch : pitch OCTAVE
    '''
    count = len(p[2])
    increment_or_decrement = 1 if p[2][0] == "," else -1
    octave = 8 + (count * increment_or_decrement)
    p[1].octave = octave
    p[0] = p[1]

def p_error(p):
    print "Syntax error at '%s' of element type %s" % (p.value, p.type)
    
yacc.yacc()

#print yacc.parse("GFG B'AB,, | g/2fg gab | GFG BAB | d2A AFD")
print yacc.parse(s)