打印进度条

import time
for i in range(0,101,2):
    time.sleep(0.1)
    char_num = i//2
    per_st = '\r%s%%：%s\n'%(i,'*'* char_num) if i ==100 else '\r%s%%：%s'%(i,'*'*char_num)
    print(per_st,end='')