save project

diy.py

@@ -6,9 +6,12 @@
 # file1.close()
 # with open(r'C:\Users\z0116\Desktop\book.txt','a',encoding='utf-8') as file:
 #     file.write('李伟:16本\n')
-with open(r'C:\Users\z0116\Desktop\book.txt','r',encoding='utf-8') as book:
-    for data in book:
+new_data=''
+with open(r'C:\Users\z0116\Desktop\book.txt','r',encoding='utf-8') as file1:
+    for data in file1:
         if '小强:10本\n'in data:
-            print("数据在文件中")
-        else:
-            print("buzai")
\ No newline at end of file
+            data=data.replace('小强:10本','小强:11本')
+        new_data +=data
+
+with open(r'C:\Users\z0116\Desktop\book.txt','w',encoding='utf-8') as file1:
+    file1.write(new_data)
\ No newline at end of file