save project

diy.py

@@ -5,13 +5,20 @@ file1.write('小丽:11本\n')
 file1.write('李文:9本\n')
 file1.write('张伟:16本\n')
 file1.close()
-with open(r"C:\Users\Administrator\Desktop\book.txt",'a',encoding='utf-8') as file1:
+with open(r"wC:\Users\Administrator\Desktop\book.txt",'a',encoding='utf-8') as file1:
     file1.write('小强:10本\n')
     file1.write('李明:15本\n')
+new_data=''
 with open(r"C:\Users\Administrator\Desktop\book.txt",'r',encoding='utf-8') as file1:
     for data in file1:
         if '小强:10本' in data:
-            print('小强在文件中')
+            data=data.replace('小强:10本','小强:11本')
         if '小兰:12本' in data:
-            print('小兰在文件中')
-  
\ No newline at end of file
+            data=data.replace('小兰:12本','小兰:14本')
+        new_data+=data
+with open(r"wC:\Users\Administrator\Desktop\book.txt",'w',encoding='utf-8') as file1:
+    file1.write(new_data)
+with open(r"C:\Users\Administrator\Desktop\book.txt",'r',encoding='utf-8') as file1:
+    a=file1.read()
+    print(a)
+    
\ No newline at end of file