先说一下文本系统的控制符：

\r：   将光标移动到当前行的首位而不换行；

\n：   将光标移动到下一行，并不移动到首位；

\r\n： 将光标移动到下一行首位。

环境：

root@ubuntu16:/alex/py/jingdutiao# python3

Python 3.5.2 (default, Jul  5 2016, 12:43:10)

[GCC 5.4.0 20160609] on linux

Type "help", "copyright", "credits" or "license" for more information.

>>> 

方式1：

root@ubuntu16:/alex/py/jingdutiao# cat test1.py

#!/usr/bin/env python

from __future__ import division

import sys,time

j = '#'

if __name__ == '__main__':

  for i in range(1,61):

    j += '#'

    sys.stdout.write(str(int((i/60)*100))+'% '+j+'->'+ "\r")

    sys.stdout.flush()

    time.sleep(0.5)

print

root@ubuntu16:/alex/py/jingdutiao# python3 test1.py

98% ############################################################->

方式2：

root@ubuntu16:/alex/py/jingdutiao# cat test4.py

#!/usr/bin/env python

# -*- coding:utf-8 -*-

__author__ = 'l'

import sys

from time import sleep

def viewBar(i):

    """

    进度条效果

    :param i:

    :return:

    """

    output = sys.stdout

    for count in range(0, i + 1):

        second = 0.1

        sleep(second)

        output.write('\rcomplete percent ----->:%.0f%%' % count)

    output.flush()

viewBar(100)

root@ubuntu16:/alex/py/jingdutiao# python3 test4.py

complete percent ----->:100%

方式3：

tqdm模块

    tqdm是一个快速、扩展性强的进度条工具库，

    其githup地址：https://github.com/tqdm/tqdm 

1）安装：

直接使用pip安装：

    pip install tqdm

2）使用：

from time import sleep

from tqdm import tqdm

for i in tqdm(range(1, 500)):

    sleep(0.01)

自己实操：在ubuntu上默认安装到2.7环境变量里去了

root@ubuntu16:/alex/py/jingdutiao# pip install tqdm

Collecting tqdm

  Downloading tqdm-4.8.4-py2.py3-none-any.whl

Installing collected packages: tqdm

Successfully installed tqdm-4.8.4

You are using pip version 8.1.1, however version 8.1.2 is available.

You should consider upgrading via the 'pip install --upgrade pip' command.

pip install --upgrade pip

pip install tqdm

pip -V

cd /usr/local/lib/python2.7/dist-packages/

cp -r  tqdm tqdm-4.8.4.dist-info/ /usr/local/lib/python3.5/dist-packages

root@ubuntu16:/alex/py/jingdutiao# cat test5.py

from time import sleep

from tqdm import tqdm

for i in tqdm(range(1, 500)):

    sleep(0.01)

root@ubuntu16:/alex/py/jingdutiao# python3  test5.py

100%|████████████████████████████████████████████████████████████████████████| 499/499 [00:05<00:00, 92.20it/s

方式4：

root@ubuntu16:/alex/py/jingdutiao# cat   test2.py 

class ProgressBar():

  def __init__(self, width=50):

    self.pointer = 0

    self.width = width

  def __call__(self,x):

     # x in percent

     self.pointer = int(self.width*(x/100.0))

     return "|" + "#"*self.pointer + "-"*(self.width-self.pointer)+ "|\n %d percent done" % int(x)

if __name__ == '__main__':

    import time,os

pb = ProgressBar()

for i in range(101):

    os.system('clear')

    print( pb(i))

    time.sleep(0.1)

root@ubuntu16:/alex/py/jingdutiao#

执行结果：

|#################################################-|

percent done

|##################################################|   #输出100行内容，但是在屏幕会实时清屏，只展示1行

percent done

方式5：

root@ubuntu16:/alex/py/jingdutiao# python3   test3.py

====================================================================================================>100%

#cat test3.py

import sys

import time

def view_bar(num,total):

    rate = num / total

    rate_num = int(rate * 100)

    #r = '\r %d%%' %(rate_num)

    r = '\r%s>%d%%' % ('=' * rate_num, rate_num,)

    sys.stdout.write(r)

    sys.stdout.flush

if __name__ == '__main__':

    for i in range(0, 101):

        time.sleep(0.1)

        view_bar(i, 100)