Importing list data¶
If you have the config.pck
file for a version 2.1 mailing list, you can
import that into an existing mailing list in Mailman 3.0.
>>> from mailman.testing.documentation import cli
>>> command = cli('mailman.commands.cli_import.import21')
You must specify the mailing list you are importing into, and it must exist.
>>> command('mailman import21')
Usage: ... [OPTIONS] LISTSPEC PICKLE_FILE
Try 'import21 --help' for help.
Error: Missing argument 'LISTSPEC'.
You must also specify a pickle file to import.
>>> command('mailman import21 import@example.com')
Usage: ... [OPTIONS] LISTSPEC PICKLE_FILE
Try 'import21 --help' for help.
Error: Missing argument 'PICKLE_FILE'.
Too bad the list doesn’t exist.
>>> from importlib_resources import path
>>> with path('mailman.testing', 'config.pck') as pickle_path:
... pickle_file = str(pickle_path)
... command('mailman import21 import@example.com ' + pickle_file)
Usage: ... [OPTIONS] LISTSPEC PICKLE_FILE
Try 'import21 --help' for help.
Error: No such list: import@example.com
When the mailing list exists, you must specify a real pickle file to import from.
>>> from mailman.app.lifecycle import create_list
>>> mlist = create_list('import@example.com')
>>> from mailman.config import config
>>> transaction = config.db
>>> transaction.commit()
>>> command('mailman import21 import@example.com ' + __file__)
Usage: ... [OPTIONS] LISTSPEC PICKLE_FILE
Try 'import21 --help' for help.
Error: Not a Mailman 2.1 configuration file: .../import.rst'...
Now we can import the test pickle file. As a simple illustration of the import, the mailing list’s “real name” will change.
>>> print(mlist.display_name)
Import
>>> command('mailman import21 import@example.com ' + pickle_file)
Importing ...
>>> print(mlist.display_name)
Test