feat: allow assigning directly to Series.name property (#495)

Co-authored-by: Tim Sweña (Swast) <[email protected]>

bigframes/series.py

@@ -109,6 +109,11 @@ def at(self) -> bigframes.core.indexers.AtSeriesIndexer:
     def name(self) -> blocks.Label:
         return self._name
 
+    @name.setter
+    def name(self, label: blocks.Label):
+        new_block = self._block.with_column_labels([label])
+        self._set_block(new_block)
+
     @property
     def shape(self) -> typing.Tuple[int]:
         return (self._block.shape[0],)

tests/system/small/test_series.py

@@ -1667,6 +1667,21 @@ def test_empty_true_memtable(session: bigframes.Session):
     assert bf_result == pd_result
 
 
+def test_series_names(scalars_dfs):
+    scalars_df, scalars_pandas_df = scalars_dfs
+
+    bf_result = scalars_df["string_col"].copy()
+    bf_result.index.name = "new index name"
+    bf_result.name = "new series name"
+
+    pd_result = scalars_pandas_df["string_col"].copy()
+    pd_result.index.name = "new index name"
+    pd_result.name = "new series name"
+
+    assert pd_result.name == bf_result.name
+    assert pd_result.index.name == bf_result.index.name
+
+
 def test_dtype(scalars_dfs):
     scalars_df, scalars_pandas_df = scalars_dfs