save project

diy.py

 # 写入同学们的捐赠明细：'小兰：12本'、'小丽：11本'、'李文：9本'、'张伟：16本'
-with open(r'C:\Users\Administrator\Desktop\test.txt','a',encoding='utf-8')as file1:
+'''with open(r'C:\Users\Administrator\Desktop\test.txt','a',encoding='utf-8')as file1:
         file1.write('小强:12本\n')
         file1.write('李明:15本\n')
 file1=open(r'C:\Users\Administrator\Desktop\test.txt','a',encoding='utf-8')
@@ -9,9 +9,19 @@ file1.close()#追加
 file1=open(r'C:\Users\Administrator\Desktop\test.txt','r',encoding='utf-8')
 a=file1.read()
 print(a)
-
-file1.close()#读取
+file1.close()'''#读取
+new_data=''
 with open(r'C:\Users\Administrator\Desktop\test.txt','r',encoding='utf-8')as file1:
         for data in file1:
-            if '小丽:10' in data:
-                print("存在")
+            if '小强:12本' in data:
+                data=data.replace('小强:12本','小强:13本')
+            new_data+=data
+with open(r'C:\Users\Administrator\Desktop\test.txt','w',encoding='utf-8')
+    file1.write(new_data)       
+with open(r'C:\Users\Administrator\Desktop\test.txt','r',encoding='utf-8')
+    a=file1.read()
+    print(a)
+
+                
+                
+