Connection.set_progress_handler

Set progress handler callback.

  progress_handler
    A callable that takes no arguments.
    If the callable returns non-zero, the current query is
    terminated, and an exception is raised.
  n
    The number of SQLite virtual machine instructions that are
    executed between invocations of 'progress_handler'.

If 'progress_handler' is None or 'n' is 0, the progress handler is
disabled.