Split code into separate class files

openscad_py/difference.py

@@ -0,0 +1,19 @@
+
+from typing import Union as TUnion
+from typing import List
+import math
+
+from openscad_py.object_ import Object
+from openscad_py.collection import Collection
+
+
+class Difference(Object):
+    """Represents a difference"""
+
+    def __init__(self, subject: Object, tool: TUnion[list, Object]):
+        self.subject = subject
+        self.tool = Collection.c(tool)  # what to remove
+
+    def render(self) -> str:
+        return f"difference(){{ {self.subject.render()}\n{self.tool.render()} }}"
+