[Python] "LookupError: No installed app with label 'admin'." when using muppy in django

I have a django + drf application that has no admin site, which works very well for us. However, when using pympler and muppy like this:

class DashboardViewSet(
SpecialEndpoint,
):
def list(self, request, *args, **kwargs):
from pympler import tracker
tr = tracker.SummaryTracker()
[...]
tr.print_diff()

return Response(...)


I get this error:

File "src/api/views/case_manager/dashboard/dashboard_viewset.py", line 33, in list
tr = tracker.SummaryTracker()
File "lib/python3.13/site-packages/pympler/tracker.py", line 45, in __init__
self.s0 = summary.summarize(muppy.get_objects())
~~~~~~~~~~~~~~~~~^^
File "lib/python3.13/site-packages/pympler/muppy.py", line 42, in get_objects
tmp = [o for o in tmp if not ignore_object(o)]
~~~~~~~~~~~~~^^^
File "lib/python3.13/site-packages/pympler/muppy.py", line 17, in ignore_object
return isframe(obj)
File "lib/python3.13/inspect.py", line 507, in isframe
return isinstance(object, types.FrameType)
File "lib/python3.13/site-packages/django/utils/functional.py", line 280, in __getattribute__
value = super().__getattribute__(name)
File "lib/python3.13/site-packages/django/utils/functional.py", line 251, in inner
self._setup()
~~~~~~~~~~~^^
File "lib/python3.13/site-packages/django/contrib/admin/sites.py", line 605, in _setup
AdminSiteClass = import_string(apps.get_app_config("admin").default_site)
~~~~~~~~~~~~~~~~~~~^^^^^^^^^
File "lib/python3.13/site-packages/django/apps/registry.py", line 165, in get_app_config
raise LookupError(message)
LookupError: No installed app with label 'admin'.


This seems to happen as a DefaultAdminSite is always created, lazily, in a global variable, which muppy accesses to get the size.

Any idea how to work around this?

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