Fix _entities (#1260)

* Fix _entities

Fix iteration over entities and avoid hash collisions

* Use TopTools_MapOfShape

* Black fix

* Use 7.7 stubs

* Remove redundant pip call

Author: adam-urbanczyk

appveyor.yml

@@ -28,7 +28,6 @@ init:
 install:
     - mamba env create -f environment.yml
     - conda activate cadquery
-    - pip install git+https://github.com/CadQuery/[email protected]
 
 build: false
 

cadquery/occ_impl/shapes.py

@@ -156,7 +156,11 @@
     BRepFilletAPI_MakeFillet2d,
 )
 
-from OCP.TopTools import TopTools_IndexedDataMapOfShapeListOfShape, TopTools_ListOfShape
+from OCP.TopTools import (
+    TopTools_IndexedDataMapOfShapeListOfShape,
+    TopTools_ListOfShape,
+    TopTools_MapOfShape,
+)
 
 from OCP.TopExp import TopExp
 
@@ -747,18 +751,21 @@ def ShapeType(self) -> Shapes:
 
     def _entities(self, topo_type: Shapes) -> List[TopoDS_Shape]:
 
-        out = {}  # using dict to prevent duplicates
+        rv = []
+        shape_set = TopTools_MapOfShape()
 
         explorer = TopExp_Explorer(self.wrapped, inverse_shape_LUT[topo_type])
 
         while explorer.More():
             item = explorer.Current()
-            out[
-                item.HashCode(HASH_CODE_MAX)
-            ] = item  # needed to avoid pseudo-duplicate entities
+
+            # needed to avoid pseudo-duplicate entities
+            if shape_set.Add(item):
+                rv.append(item)
+
             explorer.Next()
 
-        return list(out.values())
+        return rv
 
     def _entitiesFrom(
         self, child_type: Shapes, parent_type: Shapes