patch 8.0.1744: on some systems /dev/stdout isn't writable commit https://github.com/vim/vim/commit/9980b37a80dc72eef05bf8862aaf475ab17790a5 Author: Bram Moolenaar <Bram@vim.org> Date: Sat Apr 21 20:12:35 2018 +0200 patch 8.0.1744: on some systems /dev/stdout isn't writable Problem: On some systems /dev/stdout isn't writable. Solution: Skip test if writing is not possible. (James McCoy, closes https://github.com/vim/vim/issues/2830)

#!/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