Accessing Mailman 3 list members via Python/Django management console - django

Question

I am trying to access members of an existing Mailman 3 mailing list directly from Django Management console on a Debian Bullseye where Mailman is installed from deb packages (mailman3-full). I can connect to the Django admin console like this (all 3 variants seem to work fine):
$ /usr/share/mailman3-web/manage.py shell
$ mailman-web shell
$ mailman-web shell --settings /etc/mailman3/mailman-web.py
Python 3.9.2 (default, Feb 28 2021, 17:03:44)
>>>
But inside the Django admin console, some mailman components seem to be missing.
I try to access the list manager as described here: Docs > Models > The mailing list manager:
>>> from mailman.interfaces.listmanager import IListManager
>>> from zope.component import getUtility
>>> list_manager = getUtility(IListManager)
Traceback (most recent call last):
File "<console>", line 1, in <module>
File "/usr/lib/python3/dist-packages/zope/component/_api.py", line 169, in getUtility
raise ComponentLookupError(interface, name)
zope.interface.interfaces.ComponentLookupError: (<InterfaceClass mailman.interfaces.listmanager.IListManager>, '')
Can't figure out why this ComponentLookupError happens.
Also tried to acccess a list with the ListManager implementation:
>>> from mailman.config import config
>>> from mailman.model.listmanager import ListManager
>>> list_manager = ListManager()
>>> list_manager.get('mynews#example.com')
Traceback (most recent call last):
File "<console>", line 1, in <module>
File "/usr/lib/python3/dist-packages/mailman/database/transaction.py", line 85, in wrapper
return function(args[0], config.db.store, *args[1:], **kws)
AttributeError: 'NoneType' object has no attribute 'store'
>>> list_manager.get_by_list_id('mynews.example.com')
Traceback (most recent call last):
File "<console>", line 1, in <module>
File "/usr/lib/python3/dist-packages/mailman/database/transaction.py", line 85, in wrapper
return function(args[0], config.db.store, *args[1:], **kws)
AttributeError: 'NoneType' object has no attribute 'store'
What am I doing wrong here? None of the examples in the Mailman 3 models documentation is working if I don't even get that far.
any help greatly appreciated!

Answer 1

It's just the wrong shell you are using. You should use Mailman core shell instead.
It is accessible via just mailman shell in your system most probably.

Answer 2

So mailman shell works great and I could run this interactively:
from mailman.interfaces.listmanager import IListManager
from zope.component import getUtility
from mailman.testing.documentation import dump_list
from operator import attrgetter
def dump_members(roster):
all_addresses = list(member.address for member in roster)
sorted_addresses = sorted(all_addresses, key=attrgetter('email'))
dump_list(sorted_addresses)
list_manager = getUtility(IListManager)
mlist = list_manager.get('ant#example.com')
dump_members(mlist.members.members)
but how could I put this into a script that could be run with mailman withlist -r listmembers -l ant#example.com?
from mailman.testing.documentation import dump_list
from operator import attrgetter
def listmembers(mlist):
roster = mlist.members.members
all_addresses = list(member.address for member in roster)
sorted_addresses = sorted(all_addresses, key=attrgetter('email'))
dump_list(sorted_addresses)
where would I put such a listmembers.py runner? I tried to put it into /usr/lib/python3/dist-packages/mailman/runners directory, but didn't work:
$ mailman withlist -r listmembers -l ant#example.com
ModuleNotFoundError: No module named 'listmembers'
Thanks!