Python实现进度条总结，倒计时

倒计时：

import sys
print('倒计时程序！')
for i in range(10, -1, -1):
    mystr = '\r倒计时%s秒' % str(i)
    sys.stdout.write(mystr)
    sys.stdout.flush()
    time.sleep(1)

View Code

进度条，个人常用方式5

  1 先说一下文本系统的控制符：
  2 \r：   将光标移动到当前行的首位而不换行；
  3 \n：   将光标移动到下一行，并不移动到首位；
  4 \r\n： 将光标移动到下一行首位。
  5      
  6 环境：
  7 root@ubuntu16:/alex/py/jingdutiao# python3
  8 Python 3.5.2 (default, Jul  5 2016, 12:43:10)
  9 [GCC 5.4.0 20160609] on linux
 10 Type "help", "copyright", "credits" or "license" for more information.
 11 >>>
 12      
 13 方式1：
 14 root@ubuntu16:/alex/py/jingdutiao# cat test1.py
 15 #!/usr/bin/env python
 16 from __future__ import division
 17 import sys,time
 18 j = '#'
 19 if __name__ == '__main__':
 20   for i in range(1,61):
 21     j += '#'
 22     sys.stdout.write(str(int((i/60)*100))+'% '+j+'->'+ "\r")
 23     sys.stdout.flush()
 24     time.sleep(0.5)
 25 print
 26  
 27 root@ubuntu16:/alex/py/jingdutiao# python3 test1.py
 28 98% ############################################################->
 29  
 30  
 31 方式2：
 32 root@ubuntu16:/alex/py/jingdutiao# cat test4.py
 33 #!/usr/bin/env python
 34 # -*- coding:utf-8 -*-
 35 __author__ = 'l'
 36  
 37 import sys
 38 from time import sleep
 39 def viewBar(i):
 40     """
 41     进度条效果
 42     :param i:
 43     :return:
 44     """
 45     output = sys.stdout
 46     for count in range(0, i + 1):
 47         second = 0.1
 48         sleep(second)
 49         output.write('\rcomplete percent ----->:%.0f%%' % count)
 50     output.flush()
 51  
 52 viewBar(100)
 53 root@ubuntu16:/alex/py/jingdutiao# python3 test4.py
 54 complete percent ----->:100%
 55  
 56  
 57 方式3：
 58 tqdm模块
 59     tqdm是一个快速、扩展性强的进度条工具库，
 60     其githup地址：https://github.com/tqdm/tqdm
 61      
 62 1）安装：
 63 直接使用pip安装：
 64     pip install tqdm
 65 2）使用：
 66 from time import sleep
 67 from tqdm import tqdm
 68 for i in tqdm(range(1, 500)):
 69     sleep(0.01)
 70      
 71 自己实操：在ubuntu上默认安装到2.7环境变量里去了
 72 root@ubuntu16:/alex/py/jingdutiao# pip install tqdm
 73 Collecting tqdm
 74   Downloading tqdm-4.8.4-py2.py3-none-any.whl
 75 Installing collected packages: tqdm
 76 Successfully installed tqdm-4.8.4
 77 You are using pip version 8.1.1, however version 8.1.2 is available.
 78 You should consider upgrading via the 'pip install --upgrade pip' command.
 79  
 80 pip install --upgrade pip
 81 pip install tqdm
 82 pip -V
 83 cd /usr/local/lib/python2.7/dist-packages/
 84 cp -r  tqdm tqdm-4.8.4.dist-info/ /usr/local/lib/python3.5/dist-packages
 85 root@ubuntu16:/alex/py/jingdutiao# cat test5.py
 86 from time import sleep
 87 from tqdm import tqdm
 88 for i in tqdm(range(1, 500)):
 89     sleep(0.01)
 90 root@ubuntu16:/alex/py/jingdutiao# python3  test5.py
 91 100%|████████████████████████████████████████████████████████████████████████| 499/499 [00:05<00:00, 92.20it/s
 92  
 93  
 94  
 95 方式4：
 96 root@ubuntu16:/alex/py/jingdutiao# cat   test2.py
 97  
 98 class ProgressBar():
 99   def __init__(self, width=50):
100     self.pointer = 0
101     self.width = width
102   def __call__(self,x):
103      # x in percent
104      self.pointer = int(self.width*(x/100.0))
105      return "|" + "#"*self.pointer + "-"*(self.width-self.pointer)+ "|\n %d percent done" % int(x)
106  
107 if __name__ == '__main__':
108     import time,os
109 pb = ProgressBar()
110 for i in range(101):
111     os.system('clear')
112     print( pb(i))
113     time.sleep(0.1)
114  
115 root@ubuntu16:/alex/py/jingdutiao#
116 执行结果：
117 |#################################################-|
118 percent done
119 |##################################################|   #输出100行内容，但是在屏幕会实时清屏，只展示1行
120 percent done
121  
122  
123 方式5：
124 root@ubuntu16:/alex/py/jingdutiao# python3   test3.py
125 ====================================================================================================>100%
126 #cat test3.py
127 import sys
128 import time
129 def view_bar(num,total):
130     rate = num / total
131     rate_num = int(rate * 100)
132     #r = '\r %d%%' %(rate_num)     #r = '\r%s %d%%' % ('当前进度：' ,rate_num)
133     r = '\r%s>%d%%' % ('=' * rate_num, rate_num,)
134     sys.stdout.write(r)
135     sys.stdout.flush
136 if __name__ == '__main__':
137     for i in range(0, 101):
138         time.sleep(0.1)
139         view_bar(i, 100)

posted on 2018-04-16 08:58 math98 阅读(748) 评论(0) 收藏举报