From SF patch #852334.

Remove the ability to use (from C) arbitrary objects supporting the
read buffer interface as the co_code member of code objects.

sentinel variable

the function prototype.

Already backported to release23-maint.

(Contributed by George Yoshida.)

(Contributed by Andrew I MacIntyre.)

disables opcode prediction when dynamic execution
profiling is in effect, so the profiling counters at
the top of the main interpreter loop in eval_frame()
are updated for each opcode.

(Contributed by George Yoshida.)

* Also convert tabs to spaces.

(Contributed by Mike Pall.)

Make sure fill_free_list() is called only once rather than 106 times
when pre-allocating small ints.

(Reported by Drew Perttula.)

(Contributed by Alexey Klimkin.)

Don't keep the file descriptor after the channel is deleted.

  2.  Failure to clear the error when attempts to get the __getstate__
  attribute fail caused intermittent errors and odd behavior.

fairly simpleminded adaptation of Zope3's test.py -T flag.

I also changed some booleans to use True/False where appropriate.

  comes from and show the differences from lists).
* Add a rotate() method.

Python/thread_pthread.h.

time.strptime().

* Let deques support reversed().

Simplified version of Neal Norwitz's patch which adds gotos for
opcodes that set "why".  This skips a number of tests where the
outcome of the tests are known in advance.