Added basic music21 converter

.gitignore

@@ -165,6 +165,7 @@ cython_debug/
 # VSCode
 .vscode
 
-# Debugging file
+# Debugging files
 debug.py
+test.py
 

test.py

@@ -1,4 +1,8 @@
 from ziffers import *
-# a = z1("q e 1 ^ ^ 2 _ 3 4 <3> 3")
-a = z1("1 2")
-print(a.take(3))
+from music21 import *
+
+z = z('e (1 2 3)+(4 2 1)*2')
+s = to_music21(z,octave=-2,time="3/4")
+
+s.show()
+s.show('midi')

ziffers/__init__.py

@@ -4,3 +4,4 @@ from .classes import *
 from .common import *
 from .defaults import *
 from .scale import *
+from .converters import *

ziffers/classes.py

@@ -1,5 +1,5 @@
 """ Ziffers classes for the parsed notation """
-from dataclasses import dataclass, field, replace
+from dataclasses import dataclass, field, replace, asdict
 from itertools import product, islice, cycle
 import operator
 import random
@@ -31,6 +31,9 @@ class Meta:
                 if getattr(self, key) is None:
                     setattr(self, key, value)
 
+    def dict(self):
+        return {k: str(v) for k, v in asdict(self).items()}
+
 
 @dataclass(kw_only=True)
 class Item(Meta):

ziffers/converters.py

@@ -0,0 +1,61 @@
+"""Collection of converters"""
+from music21 import converter, note, stream, meter
+from ziffers import zparse, Ziffers
+
+def to_music21(strData: str|Ziffers, **options):
+    """Helper for passing options to the parser"""
+    converter.registerSubconverter(ZiffersMusic21)
+    
+    if isinstance(strData,Ziffers):
+        if options:
+            options["preparsed"] = strData
+        else:
+            options = {"preparsed": strData}
+        options = {"ziffers": options}
+        return converter.parse("PREPARSED", format="ziffers", keywords=options)
+
+    if options:
+        options = {"ziffers": options}
+        return converter.parse(strData, format="ziffers", keywords=options)
+    else:
+        test = converter.parse(strData, format="ziffers")
+        return test
+
+def set_musescore_path(path: str):
+    """Helper for setting the Musescore path"""
+    us = environment.UserSettings()
+    # Default windows path:
+    # 'C:\\Program Files\\MuseScore 3\\bin\\MuseScore3.exe'
+    us['musicxmlPath'] = path
+    us['musescoreDirectPNGPath'] = path
+
+class ZiffersMusic21(converter.subConverters.SubConverter):
+    """Ziffers converter to Music21"""
+    registerFormats = ("ziffers",)
+    registerInputExtensions = ("zf",)
+
+    def parseData(self, strData, number=None):
+        """Parses Ziffers string to Music21 object"""
+        # Look for options in keywords object
+        keywords = self.keywords["keywords"]
+        if "ziffers" in keywords:
+            options = keywords["ziffers"]
+            if "preparsed" in options:
+                parsed = options["preparsed"]
+            else:
+                parsed = zparse(strData, **options)
+        else:
+            parsed = zparse(strData)
+
+        s = stream.Part()
+        if "time" in options:
+            m = meter.TimeSignature(options["time"])  # Common time
+        else:
+            m = meter.TimeSignature("c")  # Common time
+
+        s.insert(0, m)
+        for z in parsed:
+            m_note = note.Note(z.note)
+            m_note.duration.quarterLength = z.duration * 4
+            s.append(m_note)
+        self.stream = s.makeMeasures()