Do not assign column names again for empty DataFrame

GenericMappingTools · Mar 29, 2024 · 065ec12 · 065ec12
1 parent 71cc9b7
commit 065ec12
Showing 1 changed file with 2 additions and 2 deletions.
diff --git a/pygmt/datatypes/dataset.py b/pygmt/datatypes/dataset.py
@@ -234,8 +234,8 @@ def to_dataframe(
         else:
             # Create a DataFrame object by concatenating multiple columns
             df = pd.concat(objs=vectors, axis="columns")
-        if column_names is not None:  # Assign column names
-            df.columns = column_names
+            if column_names is not None:  # Assign column names
+                df.columns = column_names
         if dtype is not None:  # Set dtype for the whole dataset or individual columns
             df = df.astype(dtype)
         if index_col is not None:  # Use a specific column as index