From 71e59be21c79462c19f60ec7061f55092fb18c56 Mon Sep 17 00:00:00 2001
From: Edward Astill <edwardast.ll@gmail.com>
Date: Fri, 28 Feb 2025 15:37:08 +0800
Subject: [PATCH 1/3]     Rename method to clarify functionality in geometry
 processing

    Replaced `find_holes` with `filter_polygons` to improve clarity of intent and better reflect the method's purpose. This change enhances code readability and semantic accuracy in the polygon filtering process.
---
 src/sectionproperties/pre/geometry.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/sectionproperties/pre/geometry.py b/src/sectionproperties/pre/geometry.py
index c0a61b33..7a83e3c2 100644
--- a/src/sectionproperties/pre/geometry.py
+++ b/src/sectionproperties/pre/geometry.py
@@ -2511,7 +2511,7 @@ def load_dxf(
     my_dxf.cleanup()
 
     polygons = my_dxf.polygons
-    new_polygons = c2s.utils.find_holes(polygons)
+    new_polygons = c2s.utils.filter_polygons(polygons)
 
     if isinstance(new_polygons, MultiPolygon):
         return CompoundGeometry(new_polygons)

From cba295d34e55afebdb01537d5f3216fd9642e193 Mon Sep 17 00:00:00 2001
From: robbievanleeuwen <robbie.vanleeuwen@gmail.com>
Date: Thu, 6 Mar 2025 11:48:21 +0000
Subject: [PATCH 2/3] Bump pytest-check from 2.4.1 to 2.5.0

---
 uv.lock | 1 +
 1 file changed, 1 insertion(+)

diff --git a/uv.lock b/uv.lock
index 0860c55f..6a6fb78e 100644
--- a/uv.lock
+++ b/uv.lock
@@ -1646,6 +1646,7 @@ version = "2.5.0"
 source = { registry = "https://pypi.org/simple" }
 dependencies = [
     { name = "pytest" },
+    { name = "typing-extensions", marker = "python_full_version < '3.11'" },
 ]
 sdist = { url = "https://files.pythonhosted.org/packages/ce/d7/32de906d890e3ccdad421b6db2a67ff94ebecb1f933e5f1038b69f007c30/pytest_check-2.5.0.tar.gz", hash = "sha256:3a6be8431c7720287958436d97a6b823eed5ae5ceb7da5572a0e4a9462feaf88", size = 26844 }
 wheels = [

From 740228f33ff3a474c1e6da3572be52b138cffe3e Mon Sep 17 00:00:00 2001
From: Edward Astill <edwardast.ll@gmail.com>
Date: Fri, 7 Mar 2025 12:59:48 +0800
Subject: [PATCH 3/3] changes to support filter_polygons

---
 src/sectionproperties/pre/geometry.py | 21 +++++++++++++--------
 typings/cad_to_shapely/__init__.pyi   |  2 +-
 typings/cad_to_shapely/utils.pyi      |  4 ++++
 3 files changed, 18 insertions(+), 9 deletions(-)

diff --git a/src/sectionproperties/pre/geometry.py b/src/sectionproperties/pre/geometry.py
index 7a83e3c2..bdae94d3 100644
--- a/src/sectionproperties/pre/geometry.py
+++ b/src/sectionproperties/pre/geometry.py
@@ -2510,17 +2510,22 @@ def load_dxf(
     my_dxf.process(spline_delta=spline_delta, degrees_per_segment=degrees_per_segment)
     my_dxf.cleanup()
 
-    polygons = my_dxf.polygons
-    new_polygons = c2s.utils.filter_polygons(polygons)
-
-    if isinstance(new_polygons, MultiPolygon):
-        return CompoundGeometry(new_polygons)
-    elif isinstance(new_polygons, Polygon):  # pyright: ignore [reportUnnecessaryIsInstance]
-        return Geometry(new_polygons)
-    else:
+    # ensure list length > 0
+    if len(new_polygons) == 0:
         msg = f"No shapely.Polygon objects found in file: {dxf_filepath}"
         raise RuntimeError(msg)
 
+    # ensure only Polygons are generated
+    for poly in new_polygons:
+        if not isinstance(poly, Polygon):  # pyright: ignore [reportUnnecessaryIsInstance]
+            msg = f"Not all objects found in file: {dxf_filepath} are Polygons"
+            raise RuntimeError(msg)
+
+    if len(new_polygons) == 1:
+        return Geometry(new_polygons[0])
+    else:
+        return CompoundGeometry(MultiPolygon(new_polygons))
+
 
 def create_facets(
     points_list: list[tuple[float, float]],
diff --git a/typings/cad_to_shapely/__init__.pyi b/typings/cad_to_shapely/__init__.pyi
index 87797693..082a9fb5 100644
--- a/typings/cad_to_shapely/__init__.pyi
+++ b/typings/cad_to_shapely/__init__.pyi
@@ -1,2 +1,2 @@
 from .dxf import DxfImporter
-from .utils import find_holes
+from .utils import filter_polygons, find_holes
\ No newline at end of file
diff --git a/typings/cad_to_shapely/utils.pyi b/typings/cad_to_shapely/utils.pyi
index f61ebec0..7254214c 100644
--- a/typings/cad_to_shapely/utils.pyi
+++ b/typings/cad_to_shapely/utils.pyi
@@ -1,3 +1,7 @@
 from shapely.geometry import Polygon
 
 def find_holes(polygons: list[Polygon]) -> Polygon: ...
+def filter_polygons(
+    polygons: list[Polygon],
+    filter_flag: int = ...,
+) -> list[Polygon]: ...
\ No newline at end of file