Move has_occ() function to __init__

src/ifcopenshell-python/ifcopenshell/geom/__init__.py

@@ -21,5 +21,25 @@ from __future__ import absolute_import
 from __future__ import division
 from __future__ import print_function
 
-from . import occ_utils as utils
+def _has_occ():
+    try:
+        import OCC.Core.BRepTools
+        return True
+    except ImportError:
+        pass
+
+    try:
+        import OCC.BRepTools
+        return True
+    except ImportError:
+        pass
+
+    return False
+
+
+has_occ = _has_occ()
+
+if has_occ:
+    from . import occ_utils as utils
+    
 from .main import *

src/ifcopenshell-python/ifcopenshell/geom/main.py

@@ -28,24 +28,7 @@ from .. import ifcopenshell_wrapper
 from ..file import file
 from ..entity_instance import entity_instance
 
-
-def has_occ():
-    try:
-        import OCC.Core.BRepTools
-        return True
-    except ImportError:
-        pass
-
-    try:
-        import OCC.BRepTools
-        return True
-    except ImportError:
-        pass
-
-    return False
-
-
-has_occ = has_occ()
+from . import has_occ
 
 
 def wrap_shape_creation(settings, shape):