The concept of .pyo files no longer exists. Now .pyc files have an
optional `opt-` tag which specifies if any extra optimizations beyond
the peepholer were applied.

Patch by Eugene Toder.

while it is holding a lock to a buffered I/O object, and the main thread
tries to use the same I/O object (typically stdout or stderr).  A fatal
error is emitted instead.

while it is holding a lock to a buffered I/O object, and the main thread
tries to use the same I/O object (typically stdout or stderr).  A fatal
error is emitted instead.

Using LF can a script to fail if it tries to use a label that is
split across 512 byte blocks.  Who knows why.

Patch by Juti Noppornpitak.

It's still not necessary to build, but may be useful to some.

Patch by James Powell.

Patch by A. Jesse Jiryu Davis.

Patch by Martin Panter.

Patch by Martin Panter.

Issue #23524: Replace _PyVerify_fd function with calls to _set_thread_local_invalid_parameter_handler.

Close #23904: fix pathlib documentation misleadingly mentioning that bytes objects are accepted in the PurePath constructor

Patch by James Edwards.