patch 8.1.2338: using Visual mark sith :s gives E20 if not set Commit: https://github.com/vim/vim/commit/c672525b487992306f69ceab093291ba3b8e4246 Author: Bram Moolenaar <Bram@vim.org> Date: Sat Nov 23 21:56:46 2019 +0100 patch 8.1.2338: using Visual mark sith :s gives E20 if not set Problem: Using Visual mark sith :s gives E20 if not set. Solution: Ignore errors when handling 'incsearch'. (closes https://github.com/vim/vim/issues/3837)

#!/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