python 隨機生成任意數字任意長度的密碼

[root@harbor ~]# cat test3.py
#!/usr/bin/python
import random
a=[]
for i in range(1,40):
  a.append(i)
random.shuffle(a)
b=[str(i) for i in a]
print b
c=''.join(b)[1:33]
print c,len(c)