Merge pull request #521 from theosanderson/moreusefulerror

More useful error message for duplicate key
theosanderson · Sep 12, 2023 · 8dd1ec6 · 8dd1ec6 · vercel · Sep 12, 2023
2 parents 5dc16ea + 5035d49
commit 8dd1ec6
Showing 1 changed file with 4 additions and 0 deletions.
diff --git a/taxoniumtools/src/taxoniumtools/utils.py b/taxoniumtools/src/taxoniumtools/utils.py
@@ -27,6 +27,10 @@ def read_metadata(metadata_file, columns, key_column):
         warnings.filterwarnings("default")
         metadata.set_index(key_column, inplace=True)
         # convert metadata to dict of rows
+        if not metadata.index.is_unique:
+            raise ValueError(
+                f"Error: The key column '{key_column}' contains non-unique values in the metadata file."
+            )
 
         metadata_dict = metadata.to_dict("index")
         metadata_cols = metadata.columns