How to Copy a Dictionary from a C Extension?

[Warren Postma]

I am embedding Python. I need to make a copy of the Globals dictionary when
I start a new session in my embedded system, then delete it, and recreate
it, so I can "drop" any changes to the globals after a remote session is
completed.

Problem: If you want to copy the existing Globals used by the interpreter,
what is the way to do this?  I found pydict_copy in dictobject.c, but it's
static, so I can't invoke it directly.

Warren