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Check-in [3d9a81ddef]

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Comment:Now parses chords
Timelines: family | ancestors | descendants | both | ply
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SHA1: 3d9a81ddef69f7e9c5a6bd287f56d5969dc934c2
User & Date: spiffytech@gmail.com on 2010-11-16 16:34:11
Other Links: branch diff | manifest | tags
Context
2010-11-16
16:36
Now parses chord length check-in: 4aeb057ae0 user: spiffytech@gmail.com tags: ply
16:34
Now parses chords check-in: 3d9a81ddef user: spiffytech@gmail.com tags: ply
16:13
Improved lexing of roman numerals, including support for minor chord recognition check-in: 6dcdb96a02 user: spiffytech@gmail.com tags: ply
Changes
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Modified parse.py from [1dcfc5e85f] to [486dbc368e]. 

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#!/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]














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#!/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]
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