Django management command to change app names

renameapp.py

from django.core.management.base import BaseCommand, CommandError
from django.db import connection
from django.apps import apps


class Command(BaseCommand):
    help = ('Renames an app in the database. You will need to change imports and migrations manually')

    def add_arguments(self, parser):
        # Positional arguments
        parser.add_argument('old_app_name')
        parser.add_argument('new_app_name')
        # Optional arguments
        parser.add_argument('--dry-run',
            action='store_true',
            dest='dry',
            default=False,
            help='Only print out sql commands that would execute')

    def handle(self, *args, **options):
        old_app_name = options['old_app_name']
        new_app_name = options['new_app_name']
        self.stdout.write(old_app_name)
        self.stdout.write(new_app_name)

        sql_commands = []

        app = apps.get_app_config(old_app_name)
        django_content_update = "UPDATE django_content_type SET app_label='{}' WHERE app_label='{}'".format(new_app_name, old_app_name)
        migration_app_change = "UPDATE django_migrations SET app='{}' WHERE app='{}'".format(new_app_name, old_app_name)
        change_model_tables = "ALTER TABLE {} RENAME TO {}"
        # postgres specific??? needed??? (also below)
        postgres_seq_update = "ALTER SEQUENCE {}_id_seq RENAME TO {}_id_seq"

        sql_commands.extend([
            ('Updating django_content_type...', django_content_update),
            ('Updating migrations in db...', migration_app_change),
        ])

        for model_name, model in app.models.items():
            old_table_name = model._meta.db_table
            new_table_name = new_app_name + '_' + old_table_name.split('_')[1]
            sql_commands.append(('Changing table {} to {}'.format(old_table_name, new_table_name), change_model_tables.format(old_table_name, new_table_name)))

            # postgres specific??? needed??? (also above)
            sql_commands.append(('Change sequence of {} to {}'.format(old_table_name, new_table_name), postgres_seq_update.format(old_table_name, new_table_name)))


        self.stdout.write('Establishing connection to run commands...')
        with connection.cursor() as cursor:
            for message, command in sql_commands:
                self.stdout.write(message)
                if options['dry']:
                    self.stdout.write('WOULD EXECUTE (dry run):  ' + command)
                else:
                    self.stdout.write('EXECUTING:  ' + command)
                    cursor.execute(command)

NOTE: This management command must be executed BEFORE changing any folder/app names
Run ./manage.py renameapp --help to see the full description of the command
otherwise run ./manage.py renameapp old_app_name new_app_name to execute
or ./manage.py renameapp old_app_name new_app_name --dry-run to only print the sql commands it will execute
These commands were derived from this answer on stackoverflow
Feedback or corrections are encouraged