move tuple check case

Signed-off-by: Naren Krishna <[email protected]>

modin/pandas/indexing.py

@@ -623,16 +623,16 @@ def __getitem__(self, key):
         """
         if self.df.empty:
             return self.df._default_to_pandas(lambda df: df.loc[key])
-        if isinstance(key, tuple) and key[1] not in self.df.columns:
-            loc_series = _LocIndexer(self.__getitem__(key[0])).__getitem__(key[1])
-            loc_series.name = (key[0], key[1])
-            return loc_series
         row_loc, col_loc, ndim = self._parse_row_and_column_locators(key)
         self.row_scalar = is_scalar(row_loc)
         self.col_scalar = is_scalar(col_loc)
 
         if isinstance(row_loc, Series) and is_boolean_array(row_loc):
             return self._handle_boolean_masking(row_loc, col_loc)
+        if isinstance(key, tuple) and key[1] not in self.df.columns:
+            loc_series = _LocIndexer(self.__getitem__(key[0])).__getitem__(key[1])
+            loc_series.name = (key[0], key[1])
+            return loc_series
 
         row_lookup, col_lookup = self._compute_lookup(row_loc, col_loc)
         result = super(_LocIndexer, self).__getitem__(row_lookup, col_lookup, ndim)