1、生成指定位数的随机字符串

# -*- coding:utf-8 -*-
import random
def my_char(length):
    s=" abcdefghijklmnopqrstuvwxyz01234567890ABCDEFGHIJKL MNOPQRSTUVIXYZ!aN$x*6*( )?"
    p = "" .join(random.sample(s,length ))
    return p
a =