Issue #19619: Blacklist non-text codecs in method API

str.encode, bytes.decode and bytearray.decode now use an
internal API to throw LookupError for known non-text encodings,
rather than attempting the encoding or decoding operation and
then throwing a TypeError for an unexpected output type.

The latter mechanism remains in place for third party non-text
encodings.

7 files changed, 7 insertions, 0 deletions

diff --git a/Lib/encodings/base64_codec.py b/Lib/encodings/base64_codec.py
index 321a961..881d1ba 100644
--- a/Lib/encodings/base64_codec.py
+++ b/Lib/encodings/base64_codec.py
@@ -52,4 +52,5 @@ def getregentry():
         incrementaldecoder=IncrementalDecoder,
         streamwriter=StreamWriter,
         streamreader=StreamReader,
+        _is_text_encoding=False,
     )
diff --git a/Lib/encodings/bz2_codec.py b/Lib/encodings/bz2_codec.py
index e65d226..fd9495e 100644
--- a/Lib/encodings/bz2_codec.py
+++ b/Lib/encodings/bz2_codec.py
@@ -74,4 +74,5 @@ def getregentry():
         incrementaldecoder=IncrementalDecoder,
         streamwriter=StreamWriter,
         streamreader=StreamReader,
+        _is_text_encoding=False,
     )
diff --git a/Lib/encodings/hex_codec.py b/Lib/encodings/hex_codec.py
index e003fc3..f2ed0a7 100644
--- a/Lib/encodings/hex_codec.py
+++ b/Lib/encodings/hex_codec.py
@@ -52,4 +52,5 @@ def getregentry():
         incrementaldecoder=IncrementalDecoder,
         streamwriter=StreamWriter,
         streamreader=StreamReader,
+        _is_text_encoding=False,
     )
diff --git a/Lib/encodings/quopri_codec.py b/Lib/encodings/quopri_codec.py
index 9243fc4..70f7083 100644
--- a/Lib/encodings/quopri_codec.py
+++ b/Lib/encodings/quopri_codec.py
@@ -53,4 +53,5 @@ def getregentry():
         incrementaldecoder=IncrementalDecoder,
         streamwriter=StreamWriter,
         streamreader=StreamReader,
+        _is_text_encoding=False,
     )
diff --git a/Lib/encodings/rot_13.py b/Lib/encodings/rot_13.py
index 3140c14..fff9153 100755
--- a/Lib/encodings/rot_13.py
+++ b/Lib/encodings/rot_13.py
@@ -43,6 +43,7 @@ def getregentry():
         incrementaldecoder=IncrementalDecoder,
         streamwriter=StreamWriter,
         streamreader=StreamReader,
+        _is_text_encoding=False,
     )
 
 ### Map
diff --git a/Lib/encodings/uu_codec.py b/Lib/encodings/uu_codec.py
index 69c6f17..e3269e4 100644
--- a/Lib/encodings/uu_codec.py
+++ b/Lib/encodings/uu_codec.py
@@ -96,4 +96,5 @@ def getregentry():
         incrementaldecoder=IncrementalDecoder,
         streamreader=StreamReader,
         streamwriter=StreamWriter,
+        _is_text_encoding=False,
     )
diff --git a/Lib/encodings/zlib_codec.py b/Lib/encodings/zlib_codec.py
index e0b9cda..4c81ca1 100644
--- a/Lib/encodings/zlib_codec.py
+++ b/Lib/encodings/zlib_codec.py
@@ -74,4 +74,5 @@ def getregentry():
         incrementaldecoder=IncrementalDecoder,
         streamreader=StreamReader,
         streamwriter=StreamWriter,
+        _is_text_encoding=False,
     )