patch 8.0.1190: unusable after opening new window in BufWritePre event commit https://github.com/vim/vim/commit/2c33d7bb69c4c2c5b0e39b03cc4b0c04cfdfbb0b Author: Bram Moolenaar <Bram@vim.org> Date: Sat Oct 14 16:06:20 2017 +0200 patch 8.0.1190: unusable after opening new window in BufWritePre event Problem: Vim becomes unusable after opening new window in BufWritePre event. Solution: Call not_exiting(). (Martin Tournoij, closes #2205) Also for "2q" when a help window is open. Add a test.

#!/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