Prevent error when creating ps.Series from ps.Series

Author: petern48

python/pyspark/pandas/series.py

@@ -398,12 +398,15 @@ def __init__(  # type: ignore[no-untyped-def]
 
         self._anchor: DataFrame  # type: ignore[annotation-unchecked]
         self._col_label: Label  # type: ignore[annotation-unchecked]
-        if isinstance(data, DataFrame):
+        if isinstance(data, (DataFrame, Series)):
             assert dtype is None
             assert name is None
             assert not copy
             assert not fastpath
 
+            if isinstance(data, Series):
+                data = DataFrame(data)
+
             self._anchor = data
             self._col_label = index
         else:

python/pyspark/pandas/tests/series/test_series.py

@@ -103,6 +103,12 @@ def test_empty_series(self):
 
         self.assertTrue(pser_a.empty)
 
+    def test_series_from_series(self):
+        pser = ps.Series([1, 2, 3, 4, 5, 6, 7], name="x")
+
+        self.assert_eq(ps.Series(pser), pser)
+        self.assert_eq(ps.Series(pser, name="y"), pser.rename("y"))
+
     def test_all_null_series(self):
         pser_a = pd.Series([None, None, None], dtype="float64")
         pser_b = pd.Series([None, None, None], dtype="str")