# -*- coding:utf-8 -*-
# @Time  : 2019/2/20 16:43
# @Author: xiaoxiao
# @File  : list_reverse.py
import re
# import io
# file1 =open(r"C:\Users\Administrator\Desktop\0220.txt",'w',encoding='UTF-8')
# res=[]
# try:
#     while True:
#         str=file1.readline()
#         if str == '':
#             break
#         else:
#             res.append(str.strip('\n'))
# except IOError.args:
#     print("args")
# else:
#     print('%s'%res)
# finally:
#     file1.close()


# for i in range(5):
#     print(" " * (4 - i) + "*" + " *" * i)
# print()

import time

# print(time.time())#获取当前时间戳
# time.sleep(0.3)#延迟程序时间
# time.strftime()#格式化时间
# print(time.localtime())#显示当前时间信息

# x=2
# y=1
# sum=0
# for i in range(20):
#     print("%d/%d"%(x,y))
#     sum+=x/y
#     x,y=x+y,x
# print(sum)
# sum1=1
# sum2=0
# for i in range(1,21):
#     for j in range(1,i+1):
#       sum1*=j
#     sum2+=sum1
#     sum1=1
# print(sum2)

# n = 0
# s = 0
# t = 1
# for n in range(1,21):
#     print("{}*{}={}".format(t,n,t*n))
#     t *= n
#     s += t
# print ('1! + 2! + 3! + ... + 20! = %d' % s)
# with open("print_file.txt","w+") as files:
#  print(1,2,file=files)
s1=[1,2,3]


print(isinstance())

