BUG: closes issue pandas-dev#7212 - read_hdf modifying passed columns…

… list parameter when multi-indexed
ajamian · May 3, 2015 · de823fb · de823fb
1 parent b7c3271
commit de823fb
Showing 1 changed file with 5 additions and 1 deletion.
diff --git a/pandas/io/pytables.py b/pandas/io/pytables.py
@@ -4022,7 +4022,11 @@ def read(self, where=None, columns=None, **kwargs):
             df = concat(frames, axis=1, verify_integrity=False).consolidate()
 
         # apply the selection filters & axis orderings
-        df = self.process_axes(df, columns=columns)
+        if type(columns) is list:
+            columns_new = list(columns)
+        else:
+            columns_new = columns
+        df = self.process_axes(df, columns=columns_new)
 
         return df