This ensures that wheels will work when moved to machines that have the same subset of the MSVC libraries as a regular CPython install. Specifically, vcruntime##0.dll may not be installed, and should not be a dependency.

Patch by Martin Panter.

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.

robust at shutdown. If needs to release multiple resources, they are released
even if errors are occured.

robust at shutdown. If needs to release multiple resources, they are released
even if errors are occured.

implementation in issue #21408 they are redundant.

Patch by Marc Abramowitz.

Patch by Karan Goel.

Issue #22919: Windows build updated to support VC 14.0 (Visual Studio 2015), which will be used for the official 3.5 release.

This allows use with special filesystems such as VirtualBox shared folders.

This allows use with special filesystems such as VirtualBox shared folders.