Dataclass tweaks to support Python 3.11 breaking changes

See python/cpython#88840

Fixes #84

Author: ajyoon

CHANGELOG.md

@@ -1,3 +1,7 @@
+# 0.1.10 (2022-12-20)
+
+- Dataclass tweaks to support Python 3.11 breaking changes.
+
 # 0.1.9 (2022-12-15)
 
 - Create a dedicated `Tie` class for ties. Both it and `Slur` now inherit from a shared `AbstractSlur` class which provides common drawing functionality. `Tie` is a nice convenience class in that it is automatically kept horizontal; in the future it may also be shaped slightly differently than a slur. (by @craigvear)

neoscore/core/paper.py

@@ -13,11 +13,11 @@ class Paper:
 
     width: Unit
     height: Unit
-    margin_top: Unit = ZERO
-    margin_right: Unit = ZERO
-    margin_bottom: Unit = ZERO
-    margin_left: Unit = ZERO
-    gutter: Unit = ZERO
+    margin_top: Unit = field(default_factory=lambda: ZERO)
+    margin_right: Unit = field(default_factory=lambda: ZERO)
+    margin_bottom: Unit = field(default_factory=lambda: ZERO)
+    margin_left: Unit = field(default_factory=lambda: ZERO)
+    gutter: Unit = field(default_factory=lambda: ZERO)
     live_width: Unit = field(init=False)
     live_height: Unit = field(init=False)
 

neoscore/western/staff_fringe_layout.py

@@ -1,4 +1,4 @@
-from dataclasses import dataclass
+from dataclasses import dataclass, field
 
 from neoscore.core.units import ZERO, Unit
 
@@ -35,7 +35,7 @@ class StaffFringeLayout:
     If there is no key signature this will be ``ZERO``.
     """
 
-    time_signature: Unit = ZERO
+    time_signature: Unit = field(default_factory=lambda: ZERO)
     """The time signature's position, if any.
 
     If there is no time signature this will be ``ZERO``.