python-模拟进度条

#!/usr/bin/python3.4
import sys
import time
def progress(percent,width=50):
    if percent >= 100:
        percent=100

    show_str=(‘[%%-%ds]‘ %width) %(int(width * percent/100)*"#") #字符串拼接的嵌套使用
    print(‘\r%s %d%%‘ %(show_str,percent),end=‘‘)


#=========应用==========
data_size=3030333
recv_size=0
while recv_size < data_size:
    time.sleep(0.01) #模拟数据的传输延迟
    recv_size+=1024 #每次收1024

    recv_per=int(100*recv_size/data_size) #接收的比例
    progress(recv_per,width=30) #进度条的宽度30