Python实现带百分比的进度条 Python实现带百分比的进度条
人气:0想了解Python实现带百分比的进度条的相关内容吗,在本文为您仔细讲解Python实现带百分比的进度条的相关知识和一些Code实例,欢迎阅读和指正,我们先划重点:Python百分比进度条,Python进度条,python实现进度条,下面大家一起来学习吧。
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()
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