学习：流水编号

Posted 2020-11-20 yanhuaqiang

import datetime
import random
import 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 = 0
d1 = 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))