save project

diy.py

@@ -7,9 +7,14 @@
 # f=open(r'D:\test.txt','r',encoding='utf-8')
 # # f.write('张伟：16本\n')
 # f.close()
+new_data=''
 with open(r'D:\test.txt','r',encoding='utf-8') as f:
 #     f.write('小明：22本')
 # ee
     for i in f:
         if '小明：22本'  in i :
-            print("有")
+            # print("有")
+            i=i.replace('小明：22本','小明：29本')
+            new_data+=i
+with open(r'D:\test.txt','w',encoding='utf-8') as f:
+    f.write(new_data)            
\ No newline at end of file