save project

diy.py

@@ -2,8 +2,9 @@
 #diy=open(r'C:\Users\qwd.txt,'w',encoding='utf-8')
 #diy=open(r'C:\Users\qwd.txt,'w',encoding='utf-8')
 #diy.write('小兰:12本\n')
 #diy.write('小兰:12本\n')
 #diy.close()
 #diy.close()
-diy=open(r'C:\Users\qwd.txt,'a',encoding='utf-8')
-diy.write('小兰:12本\n')
-diy.write('李明:15本\n')
-diy.write('小强:10本\n')
-diy.close()
+new_data=""
+with open(r'C:\Users\qwd.txt,'a',encoding='utf-8')as diy:
+for data in diy:
+    if "小强:10本" in data:
+        data=data.replace("小强:10本","小强:11本")
\ No newline at end of file
+    new_data+=data
\ No newline at end of file