patch 8.2.2186: Vim9: error when using 'opfunc' Commit: https://github.com/vim/vim/commit/5b3d1bb0f5180266c4de4d815b3ea856a2fb3519 Author: Bram Moolenaar <Bram@vim.org> Date: Tue Dec 22 12:20:08 2020 +0100 patch 8.2.2186: Vim9: error when using 'opfunc' Problem: Vim9: error when using 'opfunc'. Solution: Do not expect a return value from 'opfunc'. (closes https://github.com/vim/vim/issues/7510)

#!/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