bash

echo -ne "\033[?25l"
for i in {1..1000};do
    echo -ne "\033[K completed $(( $i * 100 / 1000 ))%\r"
    sleep 0.01
done
echo
echo all completed!
echo -ne "\033[?25h"

PS:

• -n do not output the trailing newline
• -e enable interpretation of backslash escapes

• \r carriage return

• \033[?25l 关闭光标

• \033[?25h 开启光标
• \033[K 清除光标到行尾的内容

python

import sys
import time
for i in range(1, 1001):
    sys.stdout.write('\033[K[{0}%] completed\r'.format(i * 100 / 1000))
    sys.stdout.flush()
    time.sleep(0.01)
print
print 'all completed!'

another example

import sys
import time
ori_line = '=' * 50
for i in range(1, 1001):
    percent = i * 100 / 1000
    line = '\033[1;32m{}\033[0m{}'.format('>'*(percent/2), ori_line[percent/2:])
    sys.stdout.write('\033[K[{0:50}] \033[36m{1}%\033[0m\r'.format(line, percent))
    sys.stdout.flush()
    time.sleep(0.01)
print
print 'all completed!'

python logging

...
format = '\x1b[80D\x1b[1A\x1b[K[%(asctime)s \033[36m%(funcName)s\033[0m %(levelname)s] %(message)s'
...