Fix duplicate-column sorting issue in Text2SQL evaluation utils (#1954)

bug fix for dfs w/ duplicate cols

Signed-off-by: Oktie Hassanzadeh <hassanzadeh@us.ibm.com>
Co-authored-by: Elron Bandel <elronbandel@gmail.com>

Author: oktie

src/unitxt/text2sql_utils.py

@@ -856,8 +856,10 @@ def rows_to_multisets(df):
 
     def sort_df(df):
         sorted_df = df.copy()
-        for col in sorted_df.columns:
-            sorted_df[col] = sorted_df[col].astype(str).sort_values(ignore_index=True)
+        for i in range(len(sorted_df.columns)):
+            sorted_df.iloc[:, i] = (
+                sorted_df.iloc[:, i].astype(str).sort_values(ignore_index=True)
+            )
         return sorted_df
 
     if df1.empty or df2.empty or len(df1) != len(df2):