auto save

1.py

+# # #1，输入与输出
+# # b=input('输入一个数字')
+# # b=int(b)
+# # print(b+7)
+
+# # #变量
+# # a=1
+# # a=a+10
+# # print(a)
+
+
+# #数据类型
+# #字符串 增 '1'+'2'='12'
+# #整型  1+1=2 3+3=6
+# #可以转化  
+# # a=1
+# # a=str(a)
+# # b='2'
+# # b=int(b)
+# # print(b,type(b))
+
+
+# # 算术运算符
+# # +-*/   //  %
+
+# # print(10//3)
+# # print(10%3)
+
+# # a=input("输入一个三位数")
+# # a=int(a)
+# # g=a%10
+# # print(g)
+
+# #逻辑运算符  and or not   
+# #and or    and-False  or-True
+# # print(1 or 2 and 4)
+
+#turtle
+# import turtle
+# a=turtle.Pen()
+# a.circle(50,steps=6)
+# turtle.done()
+# a=int(input("输入一个数字"))
+# b=input("输入字符串，空格隔开")
+# l1=b.split(" ")
+# print(l1)
+# l2=[]
+# for i in l1:
+#     l2.append(i[:-1])
+# def aaa(e):
+#     return len(e)
+# l2.sort(reverse=False,key=aaa)
+# for i in l2:
+#     print(i)
+
+# a=[9,3,4,5,2,7]
+# b=222
+# lis=[]
+# for i in range(len(a)):#0-5 a[i]
+#     for j in range(i+1,len(a)):
+#         lis.append(a[i]+a[j])
+# print(lis)
+# if b in lis:
+#     print(lis.count(10))
+# else:
+#     print('没有')
+
+
+
+
+# if len(a)%2==1:
+#     print(a[len(a)//2])
+# else:
+#     print((a[len(a)//2]+a[len(a)//2-1])/2)
+# print(a)
+
+
+# a=[1,2,3,4,5,6,7,8,9,10]
+# m=20
+# # s=0
+# # l=[]
+# # for i in range(len(a)):
+# #     for j in range(i+1,len(a)):
+# #         s=a[i]+a[j]
+# #         l.append(s)
+# # print(l)
+# # print(l.count(m))
+# # print(len('24'))
+
+# 数据
+# 单个  数字1，2，3
+#     字符串 “1” “按不出a”
+# a=1
+# a='abc'
+
+# 多个数据的存储
+# 列表
+# a=[1,2,3,'a','b']
+# bbj=['性别','男','年龄','25','姓名','半半俊']
+# 字典
+
+aa={1:1,2:'1','a':99}
+print(aa)
+a=1
+a=3
+
+
+
+

diy4.py

-import random
-
-# 私钥
-key = "abcdefgh使用编程实现位移替换加密，制作密码机关真是太好玩了哈哈！"
-# 要加密语句
-message = "诺依，周末一起去看动漫展吧！"
-key_message="" 
-# 请使用私钥key，对message进行加密
-for i in range(len(message)):
-    a=message[i]
-    b=random.choice(key)
-    c=random.choice(key)
-    d=a+b+c
-    key_message=key_message+d
-print(key_message)
-message1=list(key_message)
-message1.insert(random.randint(0,len(message1)),"￥%……&*$%_*^&%(%^")
-message2="".join(message1)
-print(message2)
+# # # s='13900001234'
+# # # t=s[0:3]
+# # # w=s[-4:]
+# # # print(t+'****'+w)
+
+# a=int(input("输入一个数字，空格隔开"))
+# s=input("输入字符串")
+# l1=s.split(' ')
+# new=[]
+# for i in l1:
+#     i=i[:-1]
+#     new.append(i)
+
+
+
+# def funca(e):
+#     return len(e)
+# new.sort(reverse=False,key=funca)
+# for i in new:
\ No newline at end of file
+#     print(i)
+a=[9,3,4,5,7]
+b=1
+lis=[]
+for i in range(len(a)):
+    for j in range(i+1,len(a)):
+        lis.append(a[i]+a[j])   
+lis.append(b)
+lis.sort()
+if lis.count(b)>1:
+    print(b)
+else:
+    print(lis[lis.index(b)-1])
+
+# a=12345678
+# a=str(a)
+# j=0
+# o=0
+# for i in range(len(a)):
+#     if i%2==0:
+#         j+=int(a[i])
+#     else:
+#         o+=int(a[i])
+# print(j,o,j*o)
+
+
+
+
+
+