如何在不打印到新行的情况下将输出更新到命令行？

Question

I'd like to do things like make updating progress bars and realtime counts of files processed, but I don't want it to span hundreds of line.

Specifically, I'm processing about 6500 emails and it takes several minutes. I'd like to print how many have been processed without it taking 6500 lines.

I've seen some solutions in Python 2, but I haven't been able to figure it out in Python 3.

Answer 1

You should print it using sys.stdout with carriage return '\\r' . Here you have an example:

import time
import sys

for i in range(100):
    sys.stdout.write(str(i+1) + '%\r')
    sys.stdout.flush()
    time.sleep(0.1)

Try it out!