python控制台中实现进度条功能

import sys, time

for i in range(5):
 sys.stdout.write('{0}/5\r'.format(i + 1))
 sys.stdout.flush()
 time.sleep(1)

import sys, time

for i in range(5):
 sys.stdout.write(str(i) * (5 - i) + '\r')
 sys.stdout.flush()
 time.sleep(1)

import sys, time

for i in range(5):
 sys.stdout.write(' ' * 10 + '\r')
 sys.stdout.flush()
 sys.stdout.write(str(i) * (5 - i) + '\r')
 sys.stdout.flush()
 time.sleep(1)

import sys, time

for i in range(5):
 sys.stdout.write(' ' * 10 + '\r')
 sys.stdout.flush()
 print i
 sys.stdout.write(str(i) * (5 - i) + '\r')
 sys.stdout.flush()
 time.sleep(1)

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

# Copyright: Lustralisk
# Author: Cedric Liu
# Date: 2015-11-08

import sys, time

class ProgressBar:
 def __init__(self, count = 0, total = 0, width = 50):
  self.count = count
  self.total = total
  self.width = width
 def move(self):
  self.count += 1
 def log(self, s):
  sys.stdout.write(' ' * (self.width + 9) + '\r')
  sys.stdout.flush()
  print s
  progress = self.width * self.count / self.total
  sys.stdout.write('{0:3}/{1:3}: '.format(self.count, self.total))
  sys.stdout.write('#' * progress + '-' * (self.width - progress) + '\r')
  if progress == self.width:
   sys.stdout.write('\n')
  sys.stdout.flush()

bar = ProgressBar(total = 10)
for i in range(10):
 bar.move()
 bar.log('We have arrived at: ' + str(i + 1))
 time.sleep(1)