patch 8.0.1749: VMS: 100% CPU use, redefining mch_open() fails commit https://github.com/vim/vim/commit/6537c421bb626ee92a2487a543e6287d33461bd0 Author: Bram Moolenaar <Bram@vim.org> Date: Mon Apr 23 20:46:16 2018 +0200 patch 8.0.1749: VMS: 100% CPU use, redefining mch_open() fails Problem: VMS: 100% CPU use, redefining mch_open() and mch_fopen() fails. Solution: Do not wait indefinitely in RealWaitForChar(). (Neil Rieck) Do not redefine mch_open() and mch_fopen() on VMS. (Zoltan Arpadffy)

#!/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