REGR: Series.str.encode("base64")

doc/source/whatsnew/v1.0.2.rst

@@ -19,7 +19,7 @@ Fixed regressions
 - Fixed regression in :meth:`Series.align` when ``other`` is a DataFrame and ``method`` is not None (:issue:`31785`)
 - Fixed regression in :meth:`pandas.core.groupby.RollingGroupby.apply` where the ``raw`` parameter was ignored (:issue:`31754`)
 - Fixed regression in :meth:`rolling(..).corr() <pandas.core.window.Rolling.corr>` when using a time offset (:issue:`31789`)
--
+- Fixed regression in :meth:`Series.str.encode` where ``base64`` was no longer valid for bytes objects (:issue:`32048`)
 
 .. ---------------------------------------------------------------------------
 

pandas/core/strings.py

@@ -2898,7 +2898,6 @@ def decode(self, encoding, errors="strict"):
         return self._wrap_result(result, returns_string=False)
 
     @copy(str_encode)
-    @forbid_nonstring_types(["bytes"])
     def encode(self, encoding, errors="strict"):
         result = str_encode(self._parent, encoding, errors)
         return self._wrap_result(result, returns_string=False)

pandas/tests/test_strings.py

@@ -3592,3 +3592,11 @@ def test_string_array_extract():
 
     result = result.astype(object)
     tm.assert_equal(result, expected)
+
+
+def test_bytes_encode():
+    # gh-32049
+    ser = pd.Series(list("abc"))
+    result = ser.str.encode(encoding="utf-8").str.encode(encoding="base64")
+    expected = pd.Series([b"YQ==\n", b"Yg==\n", b"Yw==\n"])
+    tm.assert_series_equal(result, expected)