Skip pyradiance import if it fails #6633

src/bonsai/bonsai/bim/module/light/__init__.py

@@ -24,7 +24,21 @@ from pathlib import Path
 
 import importlib
 import importlib.util
-import pyradiance
+import traceback
+
+# There are unresolved problems with pyradiance import that we couldn't narrow down.
+# So import is optional not to make it a showstopper for random users,
+# who don't even need pyradiance.
+# See #6633.
+try:
+    import pyradiance
+except ImportError as e:
+    print(traceback.format_exc())
+    print(
+        "PyRadiance is not available. Pyradiance Rendering functionality will be disabled. "
+        "See above for more detailed import traceback."
+    )
+    pyradiance = None
 
 
 def get_pyradiance_path():
@@ -58,12 +72,14 @@ classes = (
 def register():
     bpy.types.Scene.BIMRadianceExporeterProperies = bpy.props.PointerProperty(type=prop.RadianceExporterProperties)
     bpy.types.Scene.BIMSolarProperties = bpy.props.PointerProperty(type=prop.BIMSolarProperties)
-    pyradiance_path = Path(get_pyradiance_path())
+
-    bin_path = pyradiance_path / "bin"
+    if pyradiance:
-    if bin_path.exists():
+        pyradiance_path = Path(get_pyradiance_path())
-        for file in bin_path.iterdir():
+        bin_path = pyradiance_path / "bin"
-            if file.is_file():
+        if bin_path.exists():
-                file.chmod(file.stat().st_mode | stat.S_IEXEC)
+            for file in bin_path.iterdir():
+                if file.is_file():
+                    file.chmod(file.stat().st_mode | stat.S_IEXEC)
 
 
 def unregister():

src/bonsai/bonsai/bim/module/light/operator.py

@@ -21,7 +21,6 @@ import os
 try:
     import pyradiance as pr
 except ImportError:
-    print("PyRadiance is not available. Rendering functionality will be disabled.")
     pr = None
 
 from datetime import datetime

src/bonsai/bonsai/bim/module/light/ui.py

@@ -21,6 +21,11 @@ import bonsai.tool as tool
 from typing import TYPE_CHECKING
 from bonsai.bim.module.light.data import SolarData
 
+try:
+    import pyradiance
+except ImportError:
+    pyradiance = None
+
 
 class BIM_PT_radiance_exporter(bpy.types.Panel):
     """Creates a Panel in the render properties window"""
@@ -38,6 +43,13 @@ class BIM_PT_radiance_exporter(bpy.types.Panel):
         layout = self.layout
         props = tool.Blender.get_radiance_exporter_props()
 
+        if pyradiance is None:
+            box = layout.box()
+            box.label(text="There was a problem importing Pyradiance", icon="ERROR")
+            box.label(text="and it's functionality is not available.")
+            box.label(text="See system console logs at Bonsai startup.")
+            return
+
         if tool.Ifc.get():
             row = self.layout.row()
             row.prop(props, "should_load_from_memory")