patch 8.1.1813: ATTENTION prompt for a preview popup window commit https://github.com/vim/vim/commit/2debf1c16b93f8693a785f675320d9e949c96a97 Author: Bram Moolenaar <Bram@vim.org> Date: Sun Aug 4 20:44:19 2019 +0200 patch 8.1.1813: ATTENTION prompt for a preview popup window Problem: ATTENTION prompt for a preview popup window. Solution: Close the popup window if aborting the buffer load. Avoid getting the ATTENTION dialog.

#!/usr/bin/python
#
# Program that writes a number to stdout repeatedly
#
# This requires Python 2.6 or later.

from __future__ import print_function
import sys
import time

if __name__ == "__main__":

    done = 0
    while done < 10:
        done = done + 1
        print(done)
        sys.stdout.flush()
        time.sleep(0.05)  # sleep 50 msec