Disable shapely for are_polygons_intersecting and is_point_in_polygon

arcade/geometry/__init__.py

@@ -8,19 +8,26 @@
     are_lines_intersecting,
     is_point_in_box,
 )
-try:
+
+# Shapely is disabled due to https://github.com/pythonarcade/arcade/pull/1535
+# We are leaving the code in-place to make it easier for someone to revisit
+# in the future and improve shapely's performance.
+use_shapely = False
+# try:
+#     import shapely  # noqa: F401
+#     use_shapely = True
+# except ImportError:
+#     use_shapely = False
+if use_shapely:
     from .geometry_shapely import (
         are_polygons_intersecting,
         is_point_in_polygon,
     )
-    shapely_installed = True
-except ImportError:
+else:
     from .geometry_python import (
         are_polygons_intersecting,
         is_point_in_polygon,
     )
-    shapely_installed = False
-
 
 __all__ = [
     "are_polygons_intersecting",

arcade/paths.py

@@ -1,17 +1,20 @@
 """
 Classic A-star algorithm for path finding.
 """
-import sys
 from arcade.types import Point
 from arcade import check_for_collision_with_list, SpriteList, Sprite
 from typing import Union, List, Tuple, Set, Optional
 
-if 'shapely' in sys.modules:
+try:
+    import shapely  # noqa: F401
+    use_shapely = True
+except ImportError:
+    use_shapely = False
+if use_shapely:
     from .paths_shapely import has_line_of_sight  # noqa: F401
 else:
     from .paths_python import has_line_of_sight  # noqa: F401
 
-
 def _spot_is_blocked(position: Point,
                      moving_sprite: Sprite,
                      blocking_sprites: SpriteList) -> bool: