关于对随机字符串进行排序
def createId(num):
salt = 'tp' + ''
k = []
chars = 'a0v1c2d3e4f5g6h7i8j9k0l1m2n3o4p5q6r7s8t9u0v1w2x4y5z6'
#生成num个随机数
for n in range(num):
for i in range(3):
salt += random.choice(chars)
k.append(salt)
salt = 'tp' + ''
k.sort()
return k
