Bug filed and initial attempt at a patch by Bohuslav Kabrda.

are opened in text mode. Patch by Serhiy Storchaka.

Code patch by Serhiy Storchaka

Issue #20791: copy.copy() now doesn't make a copy when the input is a bytes object.  Initial patch by Peter Otten.

Patch by Berker Peksag.

The signature and description of PyException_SetCause now use "cause"
rather than "ctx" to match the code.

This bug was of the major reasons for the release.

Patch by Sean Rodman.

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.

Backported changeset d68df99d7a57.

Patch by Arfrever Frehtes Taifersar Arahesis.

Original patches by A. Kuchling and G. Rees (#12691).

constructed examples and all but 7 of the test/test_*.py files (run with -ucpu)
pass. Remove those that fail the new test from the selection list.
Patch partly based on patches by G. Brandl (#8478) and G. Rees (#12691).

when compiled with VS 2010 or above.  Initial patch by Tabrez Mohammed.