give TextIOWrapper a repr that tells you the encoding

2 files changed, 9 insertions, 0 deletions

diff --git a/Lib/_pyio.py b/Lib/_pyio.py
index c6811db..535c9ca 100644
--- a/Lib/_pyio.py
+++ b/Lib/_pyio.py
@@ -1399,6 +1399,9 @@ class TextIOWrapper(TextIOBase):
     #   - "bytes_..." for integer variables that count input bytes
     #   - "chars_..." for integer variables that count decoded characters
 
+    def __repr__(self):
+        return "<TextIOWrapper encoding={0}>".format(self.encoding)
+
     @property
     def encoding(self):
         return self._encoding
diff --git a/Lib/test/test_io.py b/Lib/test/test_io.py
index 5fc53ea..ef3fed9 100644
--- a/Lib/test/test_io.py
+++ b/Lib/test/test_io.py
@@ -1354,6 +1354,12 @@ class TextIOWrapperTest(unittest.TestCase):
         self.assertRaises(TypeError, t.__init__, b, newline=42)
         self.assertRaises(ValueError, t.__init__, b, newline='xyzzy')
 
+    def test_repr(self):
+        raw = self.BytesIO("hello".encode("utf-8"))
+        b = self.BufferedReader(raw)
+        t = self.TextIOWrapper(b, encoding="utf-8")
+        self.assertEqual(repr(t), "<TextIOWrapper encoding=utf-8>")
+
     def test_line_buffering(self):
         r = self.BytesIO()
         b = self.BufferedWriter(r, 1000)