Merge branch 'tickets/DM-31700'

lsst · Sep 9, 2021 · 6087c88 · 6087c88
2 parents 530e5d5 + 0cca1c5
commit 6087c88
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diff --git a/doc/changes/DM-31700.bugfix.rst b/doc/changes/DM-31700.bugfix.rst
@@ -0,0 +1,3 @@
+Fix parquet formatter error when reading tables with no indices.
+
+Previously, this would cause butler.get to fail to read valid parquet tables. 
diff --git a/python/lsst/daf/butler/formatters/parquet.py b/python/lsst/daf/butler/formatters/parquet.py
@@ -59,7 +59,7 @@ def __init__(self, path: str):
         self.file = pq.ParquetFile(path)
         self.md = json.loads(self.file.metadata.metadata[b"pandas"])
         indexes = self.md["column_indexes"]
-        if len(indexes) == 1:
+        if len(indexes) <= 1:
             self.columns = pd.Index(
                 name for name in self.file.metadata.schema.names if not name.startswith("__")
             )