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Python實(shí)現(xiàn)帶百分比的進(jìn)度條

更新時(shí)間：2016年06月28日 08:46:51 投稿：hebedich

本文給大家匯總介紹了3種使用Python實(shí)現(xiàn)帶百分比進(jìn)度條的代碼，非常的簡(jiǎn)單實(shí)用，有需要的小伙伴可以參考下

大家在安裝程序或下載文件時(shí)，通常都能看到進(jìn)度條，提示你當(dāng)前任務(wù)的進(jìn)度。其實(shí)，在python中實(shí)現(xiàn)這個(gè)功能很簡(jiǎn)單，下面是具體代碼。在實(shí)際應(yīng)用中，你完全可以根據(jù)自己的要求進(jìn)行修改！比如，示例中是通過(guò)time.sleep()方法進(jìn)行時(shí)間延遲，你完全可以根據(jù)實(shí)際的程序運(yùn)行耗時(shí)進(jìn)行控制；同樣，在進(jìn)度百分比處，你也可以顯示實(shí)際的進(jìn)度比，而不是例子中機(jī)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)

再給大家分享一個(gè)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()

再來(lái)一個(gè)復(fù)雜點(diǎn)的函數(shù)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')
# 創(chuàng)建SSH對(duì)象
ssh = paramiko.SSHClient()
# 允許連接不在know_hosts文件中的主機(jī)
ssh.set_missing_host_key_policy(paramiko.AutoAddPolicy())
t = paramiko.Transport(('vm_135',22))
# 連接服務(wù)器
t.connect(username='root',pkey=private_key)
ssh.connect(hostname='vm_135', port=22, username='root',pkey=private_key)
# 執(zhí)行命令
sftp = paramiko.SFTPClient.from_transport(t)
stdin, stdout, stderr = ssh.exec_command('df')
# 獲取命令結(jié)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?jī)?nèi)容了，大家是否對(duì)使用Python實(shí)現(xiàn)帶百分比進(jìn)度條有了新的認(rèn)識(shí)了呢，希望大家能夠喜歡。

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