Python实现带百分比的进度条_Python

大家在安装程序或下载文件时，通常都能看到进度条，提示你当前任务的进度。其实，在python中实现这个功能很简单，下面是具体代码。在实际应用中，你完全可以根据自己的要求进行修改！比如，示例中是通过time.sleep()方法进行时间延迟，你完全可以根据实际的程序运行耗时进行控制；同样，在进度百分比处，你也可以显示实际的进度比，而不是例子中机械的自增百分比。

									import sys

									import time

									def view_bar(num, total):

									  rate = num / total

									  rate_num = int(rate * 100)

									  r = '\r[%s%s]%d%%' % ("="*num, " "*(100-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)

再给大家分享一个方法

									import hashlib

									a = "a test string"

									print hashlib.md5(a).hexdigest()

									print hashlib.sha1(a).hexdigest()

									print hashlib.sha224(a).hexdigest()

									print hashlib.sha256(a).hexdigest()

									print hashlib.sha384(a).hexdigest()

									print hashlib.sha512(a).hexdigest()

再来一个复杂点的函数吧

									#!/usr/bin/env python

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

									import threading

									import time

									'''

									class Demo:

									  def __init__(self,thread_num=5):

									    self.thread_num=thread_num

									  def productor(self,i):

									    print "thread-%d start" %i

									  def start(self):

									    threads=[]

									    for x in xrange(self.thread_num):

									      t=threading.Thread(target=self.productor,args=(x,))

									      threads.append(t)

									    for t in threads:

									      t.start()

									    for t in threads:

									      t.join()

									    print 'all thread end'

									demo=Demo()

									demo.start()

									'''

									thread_num=10

									def productor(i):

									    print "thread-%d start" %i

									    time.sleep(2)

									def start():

									    threads=[]

									    for x in range(thread_num):

									      t=threading.Thread(target=productor,args=(x,))

									      threads.append(t)

									    for t in threads:

									      t.start()

									    for t in threads:

									      t.join()

									    print 'all thread end'

									start()

									#!/usr/bin/env python

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

									import paramiko

									import sys

									private_key = paramiko.RSAKey.from_private_key_file('/root/.ssh/id_rsa')

									# 创建SSH对象

									ssh = paramiko.SSHClient()

									# 允许连接不在know_hosts文件中的主机

									ssh.set_missing_host_key_policy(paramiko.AutoAddPolicy())

									t = paramiko.Transport(('vm_135',22))

									# 连接服务器

									t.connect(username='root',pkey=private_key)

									ssh.connect(hostname='vm_135', port=22, username='root',pkey=private_key)

									# 执行命令

									sftp = paramiko.SFTPClient.from_transport(t)

									stdin, stdout, stderr = ssh.exec_command('df')

									# 获取命令结果

									result = stdout.read()

									print result

									def progress_bar(transferred, toBeTransferred, suffix=''):

									    # print "Transferred: {0}\tOut of: {1}".format(transferred, toBeTransferred)

									    bar_len = 60

									    filled_len = int(round(bar_len * transferred/float(toBeTransferred)))

									    percents = round(100.0 * transferred/float(toBeTransferred), 1)

									    bar = '=' * filled_len + '-' * (bar_len - filled_len)

									    sys.stdout.write('[%s] %s%s ...%s\r' % (bar, percents, '%', suffix))

									    sys.stdout.flush()

									sftp.put("/tmp/134","/tmp/134",callback=progress_bar)

									#for filename in filenames:

									#  sftp.put(os.path.join(dirpath, filename),

									#       os.path.join(remote_path, filename),

									#       callback=self.progress_bar)

									#  print

									#  print "upload %s/%s" % (remote_path, filename) + '\t' + '[' + green("success") + ']'

									ssh.close()

以上就是本文的全部内容了，大家是否对使用Python实现带百分比进度条有了新的认识了呢，希望大家能够喜欢。

Python实现带百分比的进度条

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