Add pid to CompletedProcess object, which is returned by subprocess.run.

Feature or enhancement

Proposal:

Some processes create *. files in the filesystem, thus it might be useful to know the pid of the completed process when the user needs to process these files after termination of the process.

Has this already been discussed elsewhere?

This is a minor feature, which does not need previous discussion elsewhere

Links to previous discussion of this feature:

No response

首先阅读 subprocess.run 入口点及其返回的 CompletedProcess 对象。跟踪子进程的启动和回收过程，包括特定于平台的行为。当 subprocess.run 始终返回已完成进程的 ID，并且覆盖率验证了新属性时，即表示完成。