datatable.options.progress.callback

If None, then the built-in progress-reporting function will be used. Otherwise, this value specifies a function to be called at each progress event. The function takes a single parameter p, which is a namedtuple with the following fields:

  • p.progress is a float in the range 0.0 .. 1.0;

  • p.status is a string, one of ‘running’, ‘finished’, ‘error’ or ‘cancelled’; and

  • p.message is a custom string describing the operation currently being performed.