MongoEngine remove string from ListField
If you want to remove one element from your list you need to use the pull modifier which takes a single value not a list as you are doing so the correct query is:
Users.objects(username='some_user').update(pull__following='some_string')You can also remove several element from your "following" list using the pull_all modifier; and in this case you pass in a list of value.
Users.objects(username='some_user').update(pull_all__following=['one_string', 'another_string'])