logging-spinner 0.2.2

This library helps to display loading spinners in CLI in non-intrusive manner. Applications/libraries don’t have to depend on any third-party API, but only need to log loading messages through Python’s standard logging library:

logger = logging.getLogger('myapp.logger')
logger.info('Loading data...', extra={'user_waiting': True})
# some long taking process goes here...
logger.info('Finished loading!', extra={'user_waiting': False})

At the outest code of the application, setup a SpinnerHandler:

from logging_spinner import SpinnerHandler

logger = logging.getLogger('myapp')
logger.setLevel(logging.INFO)
logger.addHandler(SpinnerHandler())

SpinnerHandler is only aware of log records with user_waiting extra field and displays them with a spinner.

See also sample.py code.