auto save

demo.py

+num = int(input('输入一个正整数：'))
+if num == num*num%(10**len(str(num))):    # 5、25、625
+    print("是一个自守数！")
+else:
+    print("不是一个自守数！")

demo1.py

+num_list = input('录入一组正整数：')
+goal = input('录入目标数：')
+num_list = num_list.split(',')
+result = {}
+#print(num_list)
+for i in range(len(num_list)):
+    #print(num_list[i])
+    for j in range(i+1,len(num_list)):
+        #print(num_list[j],num_list[i])
+        #print('%d+%d=%d'%(int(num_list[i]),int(num_list[j]),int(num_list[i])+int(num_list[j])))
+        if int(num_list[i])+int(num_list[j]) <= int(goal):
+            result[int(num_list[i])+int(num_list[j])] = [int(num_list[i]),int(num_list[j])]
+
+if len(result) ==0:
+    print('-1')
+else:
+    print(max(result),result[max(result)])   #max函数直接取出字典中的最大'键',取字典中的值=字典名[键]]
+
+    
+
+

demo2.py

+# 判断一个数是否为自守数，如5，的平方是25，尾数正好等于5；  
+num = int(input("录入一个正整数："))
+if num == num*num%(10**len(str(num))):
+    print("是一个自守数！")
+else:
+    print("不是一个自守数！")
+

diy.py

+with open(r'c:\Users\Administrator\Documents\lesson13-1\sales_list.txt','r',encoding='utf-8') as file:
+    a = file.readlines()  #返回文件的所有行，类型为列表
+    #print(a)
+sum_list = []
+for i in a:
+    data = i.split()
+    #print(data[1:])
+    sum = 0
+    for i in data[1:]:
+        sum += int(i)
+    result = data[0]+":"+str(sum)+'\n'
+    #print(result)
+    sum_list.append(result)
+print(sum_list)    
+
+with open(r'c:\Users\Administrator\Documents\lesson13-3\sales_list.txt','a',encoding='utf-8') as file1:
+    file1.writelines(sum_list)    # writelines参数是一个列表
\ No newline at end of file

sales_list.txt

+悟空 12 15 11 12 11 12 13 21 27 12 15 30 22 26 15 12 21 23 27 11
+诺依 21 29 15 21 21 21 29 30 12 13 12 12 24 52 27 26 15
+小贝 29 11 11 15 13 15 13 11 11 29 13 11 
+李丽 13 15 20 15 15 11 17 20 20 11 12 12 20
+宋扬 11 11 11 11 15 17 11 20 
+王明 30 27 26 24 29 12 15 11 22 26 23 
+李强 12 12 11 15 11 13 25 26 11 13 15
+孙小白 25 26 12 15 27 30 48 39
+苏琪 15 11 15 15 30 13 27 11 
+刘若若 11 11 13 11 20 15 13 29 24 
+刘阳 11 15 22 11 23 26 22 15 17 52 12
+王胜男 27 15 15 26 13 12 15
+王娇 12 11 12 12 15 35 23 11
+悟空:348
+诺依:380
+小贝:182
+李丽:201
+宋扬:107
+王明:245
+李强:164
+孙小白:222
+苏琪:137
+刘若若:147
+刘阳:226
+王胜男:123
+王娇:131
+悟空:348
+诺依:380
+小贝:182
+李丽:201
+宋扬:107
+王明:245
+李强:164
+孙小白:222
+苏琪:137
+刘若若:147
+刘阳:226
+王胜男:123
+王娇:131
+悟空:348
+诺依:380
+小贝:182
+李丽:201
+宋扬:107
+王明:245
+李强:164
+孙小白:222
+苏琪:137
+刘若若:147
+刘阳:226
+王胜男:123
+王娇:131