学习：流水编号

import datetimeimport randomimport uuid

for i in range(0, 1):    nowTime = datetime.datetime.now().strftime("%Y%m%d%H%M%S")    randomNum = random.randint(0, 100)    uniqueNum = str(nowTime) + str(randomNum)    print(uniqueNum)    print(uuid.uuid1())

c = [1, 2, 5]print(max(c))# 方法一Num_begin = ‘0001‘Num_Lost = [‘0008‘, ‘0005‘, ‘0007‘]if len(Num_Lost) == 0:    Num_begin = int(Num_begin) + 1    if len(str(Num_begin)) < 5:        s = str(Num_begin).zfill(5)        print(s)    else:        print(Num_begin)else:    print(min(Num_Lost))for i in range(1, 5):    print(i)# 方法二num = []for i in range(1, 999999):    num.append(random.randint(1, 999999))num.sort(reverse=False)a = 0d1 = datetime.datetime.now()n = []for i in range(1, len(num)):    if num[i] - num[i - 1] != 1:        for j in range(num[i - 1] + 1, num[i]):                n.append(j)d2 = datetime.datetime.now()print(‘缺号：%s‘ % str(n))print(‘缺号数:%s‘ % len(n))print(‘执行时间:%s‘ % (d2-d1))

原文地址：https://www.cnblogs.com/yanhuaqiang/p/9222685.html