save project

diy.py

 # '小兰：12本'、'小丽：11本'、'李文：9本'、'张伟：16本'
+new_data=''
 with open(r'D:\cuixuanshuo\test.txt','r',encoding='utf-8') as file1:
     for data in file1:
         if '小强:10本' in data:   
-            print('小强数据在文件中')
+            data=data.replace('小强:10本','小强:11本')
         if '小兰:12本' in data:
-            print('小兰数据在文件中')
+            data=data.replace('小兰:12本','小强:14本')
+        new_data +=data
     
-    
\ No newline at end of file
+with open(r'D:\cuixuanshuo\test.txt','w',encoding='utf-8') as file1:
+    file1.write(new_data)
+  
+with open(r'D:\cuixuanshuo\test.txt','r',encoding='utf-8') as file1:
+    a=file1.read()
+    print(a)
\ No newline at end of file