[MM3-users] Mailman shell tutorial

is there a tutorial or some examples for using the mailman shell? Is there detailed documentation on it?

Anything I try to do such as the following fails:

$ mailman shell Welcome to the GNU Mailman shell

...

...

command('mailman shell --details') Traceback (most recent call last): File "<console>", line 1, in <module> NameError: name 'command' is not defined

I execute the shell as user mailman and from within the same venv that all the programs run under.