get_tag_argument

get_tag_argument() → Optional[str]

Return the value passed for the --tag argument, if any.

The --tag argument is not used directly by Alembic, but is available for custom env.py configurations that wish to use it; particularly for offline generation scripts that wish to generate tagged filenames.

This function does not require that the MigrationContext has been configured.

See also:

EnvironmentContext.get_x_argument() - a newer and more open ended system of extending env.py scripts via the command line.