Improve the error message for doImport failure

lsst · Apr 8, 2022 · fc7f16e · fc7f16e
1 parent 1c58548
commit fc7f16e
Showing 1 changed file with 3 additions and 1 deletion.
diff --git a/python/lsst/utils/doImport.py b/python/lsst/utils/doImport.py
@@ -83,7 +83,9 @@ def tryImport(
             # Move element from module to file and try again
             infileComponents.insert(0, moduleComponents.pop())
 
-    raise ModuleNotFoundError(f"Unable to import {importable}")
+    # Fell through without success.
+    extra = f"({previousError})" if previousError is not None else ""
+    raise ModuleNotFoundError(f"Unable to import {importable!r} {extra}")
 
 
 def doImportType(importable: str) -> Type: