FIX-#2709: fixed typo in '_copartition' (#2710)

Signed-off-by: Dmitry Chigarev <[email protected]>

modin/engines/base/frame/data.py

@@ -1810,7 +1810,7 @@ def get_axis_lengths(partitions, axis):
                 or others_lengths[i] != base_lengths
             )
 
-        # perform repartitioning and reindexing for `other` frames if needed
+        # perform repartitioning and reindexing for `other_frames` if needed
         reindexed_other_list = [None] * len(other_frames)
         for i in range(len(other_frames)):
             if do_repartition_others[i]:
@@ -1819,7 +1819,7 @@ def get_axis_lengths(partitions, axis):
                     i
                 ]._frame_mgr_cls.map_axis_partitions(
                     axis,
-                    other[i]._partitions,
+                    other_frames[i]._partitions,
                     make_reindexer(do_repartition_others[i], base_frame_idx + 1 + i),
                     lengths=base_lengths,
                 )

modin/pandas/test/dataframe/test_indexing.py

@@ -1243,6 +1243,8 @@ def test___setitem__(data):
 
     df_equals(modin_df, pandas_df)
 
+
+def test___setitem__partitions_aligning():
     # from issue #2390
     modin_df = pd.DataFrame({"a": [1, 2, 3]})
     pandas_df = pandas.DataFrame({"a": [1, 2, 3]})
@@ -1259,12 +1261,15 @@ def test___setitem__(data):
     # Setting new column
     pd_df["b"] = pandas.Series(np.arange(4))
     md_df["b"] = pd.Series(np.arange(4))
-
     df_equals(md_df, pd_df)
+
     # Setting existing column
     pd_df["b"] = pandas.Series(np.arange(4))
     md_df["b"] = pd.Series(np.arange(4))
+    df_equals(md_df, pd_df)
 
+    pd_df["a"] = pandas.Series(np.arange(4))
+    md_df["a"] = pd.Series(np.arange(4))
     df_equals(md_df, pd_df)