How to import and call function(written in python and transferred into go by grumpc) in go?

[always-less]

As titled, the newest grumpy.ImportModule function has only 2 params while the comment has not been updated.

And ImportModule(f, "a.b") causes the initialization and entry into sys.modules of Grumpy module a and
then Grumpy module a.b instead of b. Is this a bug?

[davejohnston]

I could do with some help on this too.
Following the steps in the README.md https://github.com/google/grumpy I've done the following:

echo 'def hello(): print "hello, world"' > $GOPATH/src/__python__/hello.py

grumpc -modname=hello $GOPATH/src/__python__/hello.py > \
    $GOPATH/src/__python__/hello/module.go

I can now use grumprun to import the module in python
echo 'from hello import hello; hello()' | grumprun

This produces the output

hello, world

What I can't do is figure out how to import the module hello in a golang main and run it.
I've tried the following:

func main() {
	grumpy.ImportModule(grumpy.NewRootFrame(), "traceback")
	os.Exit(grumpy.RunMain(hello.Code))
}

This runs, but produces no output. I'm guessing I need to call the hello() method that is generated in the init() block of module.go, but I can't see how that should be done ?