The sys.stdlib_module_names documentation says: "All module kinds are listed: pure Python, built-in, frozen and extension modules. Test modules are excluded."
https://docs.python.org/dev/library/sys.html#sys.stdlib_module_names

But I just noticed that frozen modules are not listed!

Attached PR fix this issue.

Not sure the proper place to discuss this but I wonder if putting this stdlib module names list in the executable is the best idea.  The list of available stdlib modules could change after compiling Python.  I understand you don't want to dynamically crawl the library path the build the list.  That's too slow.  However, is there a really strong reason to embed it in the Python executable?

Did you consider generating a .py module, containing the list.  E.g. "_stdlib_modules.py" inside the lib folder.  Then, you can have site.py or some similar startup logic import that module and assign it to sys.stdlib_module_names.

Neil Schemenauer: "Not sure the proper place to discuss this but I wonder if putting this stdlib module names list in the executable is the best idea."

For the rationale behind sys.stdlib_module_names, please see the bpo-42955 where alternative were discussed.

> The list of available stdlib modules could change after compiling Python.

It's documented:
"[ sys.stdlib_module_names] is the same on all platforms. Modules which are not available on some platforms and modules disabled at Python build are also listed."
https://docs.python.org/dev/library/sys.html#sys.stdlib_module_names

New changeset 307745aa42196ad3fd97fee4a1ae6496bb895596 by Victor Stinner in branch 'master':
bpo-43445: Add frozen modules to sys.stdlib_module_names (GH-24798)
https://github.com/python/cpython/commit/307745aa42196ad3fd97fee4a1ae6496bb895596

Neal: you may also read the thread on python-dev:
https://mail.python.org/archives/list/python-dev@python.org/thread/BTX7SH2CR66QCLER2EXAK2GOUAH2U4CL/