Python Implementation progress bar

Let's start with the text system's control: \ r: Moves the cursor to the top of the current line without wrapping; \ n: Moves the cursor to the next line, not to the first; \ r \ n: Moves the cursor to the top of the next line. Environment: [email protected]:/alex/py/jingdutiao# Python3python 3.5.2 (default, Jul 5, 12:43:10) [GCC 5.4.0 20160609] O n Linuxtype "Help", "copyright", "credits" or "license" for more information.>>> way 1:[email protected]:/ alex/py/jingdutiao# cat test1.py #!/usr/bin/env pythonfrom __future__ import Divisionimport sys,timej = ' # ' If __name__ = = ' __main__ ': For I in Range (1,61): J + = ' # ' Sys.stdout.write (str (int (I/60) *100) + '% ' +j+ ' + ' + ' \ R ') Sys.stdou T.flush () time.sleep (0.5) print[email protected]:/alex/py/jingdutiao# python3 test1.py 98% #################### ########################################-> mode 2:[email protected]:/alex/py/jingdutiao# cat test4.py #!/usr/ Bin/env python #-*-Coding:utf-8-*-__author__ = ' l ' Import sysfrom time import sleepdef ViewBar (i): "" "progress bar effect:p Aram I:: return: "" "Output = Sys.stdout for count in range (0, I+ 1): Second = 0.1 sleep (second) output.write (' \rcomplete percent----->:%.0f%% '% count) outpu T.flush () ViewBar (+) [email protected]:/alex/py/jingdutiao# python3 test4.py Complete percent----->:100% Mode 3:TQDM Module TQDM is a fast, extensible progress bar Tool Library, its githup address: HTTPS://GITHUB.COM/TQDM/TQDM 1) Installation: Direct use of PIP installation: Pip install tqdm2) using : From time import sleepfrom TQDM import tqdmfor i in TQDM (range (1,)): Sleep (0.01) Self-operation: default installation in Ubuntu to 2.7 environment variables [E mail protected]:/alex/py/jingdutiao# pip install tqdmcollecting tqdm downloading Tqdm-4.8.4-py2.py3-none-any.whlinstalling collected packages:tqdmsuccessfully installed Tqdm-4.8.4You is 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 pippip Install TQDMPIP-VC D/usr/local/lib/python2.7/dist-packages/cp-r TQDM tqdm-4.8.4.dist-info//usr/local/lib/python3.5/dist-packages[ email protected]:/alex/py/jingdutiao# Cat test5.py from time import sleepfrom TQDM import tqdmfor i in TQDM (range (1,)): Sleep (0.01) [Email&nbs p;protected]:/alex/py/jingdutiao# Python3 test5.py 100%| ████████████████████████████████████████████████████████████████████████|  499/499 [00:05<00:00, 92.20it/s way 4:[email protected]:/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 do NE "% int (x) If __name__ = = ' __main__ ': Import TIME,OSPB = ProgressBar () for I in Range (101): Os.system (' clear ') PR Int (PB (i)) Time.sleep (0.1) [email protected]:/alex/py/jingdutiao# execution Result: |####################################   #############-|percent done|##################################################| #输出100行内容, but the screen will clear the screen in real time, showing only 1 rows percent done way 5:[email protected]:/alex/py/jingdutiao# Python3 test3.py ========================================================================= ===========================>100% #cat test3.py Import sysimport timedef View_bar (num,total): rate = Num/total ra te_num = Int (rate *) #r = ' \ r%d%% '% (rate_num) r = ' \r%s>%d%% '% (' = ' * rate_num, rate_num,) SYS.STDOUT.W  Rite (r) Sys.stdout.flushif __name__ = = ' __main__ ': For I in range (0, 101): Time.sleep (0.1) View_bar (I, 100)

　　

Python Implementation progress bar