print()
print(......,end='\n')
****print 自带end=‘\n’，默认为换行，可以修改end=‘ ’的值。使print不换行
1 打印进度条
2 # print('[ ]')
3 # print('[## ]')
4 # print('[### ]')
5 # print('[#### ]')
6 # print('[##### ]')
7
8
9 # print('[%-50s]' %'#')
10 # print('[%-50s]' %'##')
11 # print('[%-50s]' %'###')
12
13
14 # 第一个%是取消第二个%号的特殊意义的
15 # num=30
16 # print('%s%%' %num)
17
18
19 # width=30
20 # print(('[%%-%ds]' %width) %'#')
21 # print(('[%%-%ds]' %width) %'##')
22 # print(('[%%-%ds]' %width) %'###')
23
24
25
26 #######################################
27 import time
28 recv_size = 0
29 total_size = 100000
30
31 def progress(percent,width=50):
32 if percent > 1:
33 percent =1
34 show_str = ('[%%-%ds]' %width) %(int(width*percent) * '#')
35 print('\r%s %d%%' %(show_str,int(100*percent)),end = '')
36
37 while recv_size < total_size:
38 time.sleep(0.2)
39 recv_size += 8096
40 percent = recv_size / total_size
41 progress(percent)
