patch 8.1.1604: popup window scroll test is flaky commit https://github.com/vim/vim/commit/13b47c37a650ab6045680a9e5513ef6ad71ee93f Author: Bram Moolenaar <Bram@vim.org> Date: Fri Jun 28 21:55:48 2019 +0200 patch 8.1.1604: popup window scroll test is flaky Problem: Popup window scroll test is flaky. Solution: Add a delay between scroll events.

#!/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