445 lines
11 KiB
Python
445 lines
11 KiB
Python
""" Ziffers classes for the parsed notation """
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from dataclasses import dataclass, field
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import itertools
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import operator
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import random
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from .defaults import DEFAULT_OPTIONS
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from .scale import note_from_pc, midi_to_pitch_class
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@dataclass
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class Meta:
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"""Abstract class for all Ziffers items"""
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def update(self, new_values):
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"""Update attributes from dict"""
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for key, value in new_values.items():
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if hasattr(self, key):
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setattr(self, key, value)
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def update_new(self, new_values):
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"""Updates new attributes from dict"""
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for key, value in new_values.items():
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if hasattr(self, key):
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if getattr(self, key) is None:
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setattr(self, key, value)
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@dataclass
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class Item(Meta):
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"""Class for all Ziffers text based items"""
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text: str
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@dataclass
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class Whitespace(Item):
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"""Class for whitespace"""
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item_type: str = field(default=None, repr=False, init=False)
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@dataclass
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class DurationChange(Item):
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"""Class for changing duration"""
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value: float
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key: str = field(default="duration", repr=False, init=False)
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item_type: str = field(default="change", repr=False, init=False)
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@dataclass
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class OctaveChange(Item):
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"""Class for changing octave"""
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value: int
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key: str = field(default="octave", repr=False, init=False)
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item_type: str = field(default="change", repr=False, init=False)
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@dataclass
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class OctaveAdd(Item):
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"""Class for modifying octave"""
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value: int
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key: str = field(default="octave", repr=False, init=False)
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item_type: str = field(default="add", repr=False, init=False)
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@dataclass
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class Event(Item):
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"""Abstract class for events with duration"""
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duration: float = field(default=None)
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@dataclass
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class Pitch(Event):
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"""Class for pitch in time"""
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pitch_class: int = field(default=None)
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octave: int = field(default=None)
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modifier: int = field(default=0)
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note: int = field(default=None)
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def set_note(self, note: int):
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self.note = note
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return note
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@dataclass
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class RandomPitch(Event):
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"""Class for random pitch"""
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pitch_class: int = field(default=None)
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@dataclass
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class RandomPercent(Item):
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"""Class for random percent"""
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percent: float = field(default=None)
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@dataclass
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class Chord(Event):
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"""Class for chords"""
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pitch_classes: list[Pitch] = field(default=None)
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notes: list[int] = field(default=None)
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def set_notes(self, notes: list[int]):
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"""Set notes to the class"""
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self.notes = notes
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@dataclass
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class RomanNumeral(Event):
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"""Class for roman numbers"""
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value: str = field(default=None)
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chord_type: str = field(default=None)
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notes: list[int] = field(default_factory=[])
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pitch_classes: list = None
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def set_notes(self, chord_notes: list[int]):
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self.notes = chord_notes
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def set_pitch_classes(self, pitches: list[tuple]):
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if self.pitch_classes == None:
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self.pitch_classes = []
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for pitch in pitches:
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self.pitch_classes.append(Pitch(**pitch))
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@dataclass
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class Function(Event):
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"""Class for functions"""
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run: str = field(default=None)
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@dataclass
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class Sequence(Meta):
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"""Class for sequences of items"""
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values: list[Item]
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text: str = field(default=None)
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wrap_start: str = field(default=None, repr=False)
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wrap_end: str = field(default=None, repr=False)
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local_index: int = field(default=0, init=False)
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def __post_init__(self):
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self.text = self.__collect_text()
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def __iter__(self):
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return self
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def __next__(self):
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if self.local_index < len(self.values):
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next_item = self.values[self.local_index]
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self.local_index += 1
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return next_item
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self.local_index = 0
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raise StopIteration
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def update_values(self, new_values):
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"""Update value attributes from dict"""
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for key, value in new_values.items():
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for obj in self.values:
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if key != "text" and hasattr(obj, key):
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setattr(obj, key, value)
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def __collect_text(self) -> str:
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"""Collect text value from values"""
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text = "".join([val.text for val in self.values])
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if self.wrap_start is not None:
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text = self.wrap_start + text
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if self.wrap_end is not None:
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text = text + self.wrap_end
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return text
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def flatten_values(self):
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"""Flattens the Ziffers object tree"""
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for item in self.values:
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if isinstance(item, Sequence):
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yield from item.flatten_values()
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else:
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yield item
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@dataclass
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class Ziffers(Sequence):
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"""Main class for holding options and the current state"""
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options: dict = field(default_factory=DEFAULT_OPTIONS)
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loop_i: int = 0
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iterator: iter = field(default=None, repr=False)
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current: Whitespace | DurationChange | OctaveChange | OctaveAdd = field(
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default=None
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)
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def __post_init__(self):
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super().__post_init__()
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self.iterator = self.flatten_values()
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def __next__(self):
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self.current = next(self.iterator)
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# Skip whitespace and collect duration & octave changes
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while isinstance(
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self.current, (Whitespace, DurationChange, OctaveChange, OctaveAdd)
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):
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if self.current.item_type == "change": # Change options
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self.options[self.current.key] = self.current.value
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elif self.current.item_type == "add":
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if self.current.key in self.options: # Add to existing value
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self.options[self.current.key] += self.current.value
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else: # Create value if not existing
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self.options[self.current.key] = self.current.value
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self.current = next(self.iterator) # Skip item
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# Update collected options & default options
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self.current.update_new(self.options)
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# Resolve note(s) from scale
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if set(("key", "scale")) <= self.options.keys():
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key = self.options["key"]
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scale = self.options["scale"]
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if isinstance(self.current, (Pitch, RandomPitch)):
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note = note_from_pc(
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root=key,
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pitch_class=self.current.pitch_class,
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intervals=scale,
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modifier=self.current.modifier,
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)
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self.current.set_note(note)
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elif isinstance(self.current, Chord):
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pcs = self.current.pitch_classes
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notes = [
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pc.set_note(note_from_pc(key, pc.pitch_class, scale)) for pc in pcs
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]
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self.current.set_notes(notes)
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elif isinstance(self.current, RomanNumeral):
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pitch_classes = [
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midi_to_pitch_class(note, key, scale) for note in self.current.notes
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]
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self.current.set_pitch_classes(pitch_classes)
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self.loop_i += 1
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return self.current
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def take(self, num: int) -> list[Pitch]:
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"""Take number of pitch classes from the parsed sequence. Cycles from the beginning.
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Args:
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num (int): Number of pitch classes to take from the sequence
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Returns:
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list: List of pitch class items
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"""
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return list(itertools.islice(itertools.cycle(self), num))
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def loop(self) -> iter:
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return itertools.cycle(self.iterator)
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def set_defaults(self, options: dict):
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"""Sets options for the parser
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Args:
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options (dict): Options as a dict
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"""
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self.options = DEFAULT_OPTIONS | options
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# TODO: Refactor these
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def pitch_classes(self) -> list[int]:
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"""Return list of pitch classes as ints"""
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return [val.pitch_class for val in self.values if isinstance(val, Pitch)]
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def durations(self) -> list[float]:
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"""Return list of pitch durations as floats"""
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return [val.dur for val in self.values if isinstance(val, Pitch)]
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def pairs(self) -> list[tuple]:
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"""Return list of pitches and durations"""
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return [
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(val.pitch_class, val.dur) for val in self.values if isinstance(val, Pitch)
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]
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def octaves(self) -> list[int]:
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"""Return list of octaves"""
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return [val.octave for val in self.values if isinstance(val, Pitch)]
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@dataclass
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class ListSequence(Sequence):
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"""Class for Ziffers list sequences"""
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wrap_start: str = field(default="(", repr=False)
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wrap_end: str = field(default=")", repr=False)
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@dataclass
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class Integer(Item):
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"""Class for integers"""
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value: int
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@dataclass
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class RandomInteger(Item):
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"""Class for random integer"""
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min: int
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max: int
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def __post_init__(self):
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if self.min > self.max:
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new_max = self.min
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self.min = self.max
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self.max = new_max
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def value(self):
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"""Evaluate the random value for the generator"""
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return random.randint(self.min, self.max)
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@dataclass
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class RepeatedListSequence(Sequence):
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"""Class for Ziffers list sequences"""
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repeats: RandomInteger | Integer = field(default_factory=Integer(value=1, text="1"))
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wrap_start: str = field(default="(:", repr=False)
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wrap_end: str = field(default=":)", repr=False)
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@dataclass
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class Subdivision(Item):
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"""Class for subdivisions"""
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values: list[Event]
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@dataclass
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class Cyclic(Sequence):
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"""Class for cyclic sequences"""
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cycle: int = 0
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wrap_start: str = field(default="<", repr=False)
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wrap_end: str = field(default=">", repr=False)
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def __next__(self):
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yield self.values[self.cycle % len(self.cycle)]
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self.cycle += 1
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raise StopIteration
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def value(self):
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"""Get the value for the current cycle"""
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return self.values[self.cycle % len(self.cycle)]
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@dataclass
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class Range(Item):
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"""Class for range"""
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start: int = field(default=None)
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end: int = field(default=None)
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ops = {
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"+": operator.add,
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"-": operator.sub,
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"*": operator.mul,
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"/": operator.truediv,
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"%": operator.mod,
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}
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@dataclass
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class Operator(Item):
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"""Class for math operators"""
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value: ... = field(init=False, repr=False)
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def __post_init__(self):
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self.value = ops[self.text]
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@dataclass
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class ListOperation(Sequence):
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"""Class for list operations"""
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def run(self):
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"""Run operations"""
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pass
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@dataclass
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class Operation(Item):
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"""Class for lisp-like operations: (+ 1 2 3) etc."""
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values: list
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operator: operator
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@dataclass
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class Eval(Sequence):
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"""Class for evaluation notation"""
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result: ... = None
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wrap_start: str = field(default="{", repr=False)
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wrap_end: str = field(default="}", repr=False)
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def __post_init__(self):
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super().__post_init__()
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self.result = eval(self.text)
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@dataclass
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class Atom(Item):
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"""Class for evaluable atoms"""
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value: ...
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@dataclass
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class Euclid(Item):
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"""Class for euclidean cycles"""
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pulses: int
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length: int
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onset: list
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offset: list = field(default=None)
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rotate: int = field(default=None)
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@dataclass
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class RepeatedSequence(Sequence):
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"""Class for repeats"""
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repeats: RandomInteger | Integer = field(default_factory=Integer(value=1, text="1"))
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wrap_start: str = field(default="[:", repr=False)
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wrap_end: str = field(default=":]", repr=False)
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