save project

diy.py

@@ -6,9 +6,17 @@
 # jj.write("张伟:16本")
 # jj.write("张伟:16本")
 # jj.close()
 # jj.close()
 with open(r"C:\Users\123\Desktop\新建文件夹\book.txt","r""utf-8") as jj:
 with open(r"C:\Users\123\Desktop\新建文件夹\book.txt","r""utf-8") as jj:
-    for i in jj:
-        if '小兰:12本' in i:
-           print("数据在文件中") 
+    for data in jj:
+        if '小强:12本' in data:
+            data=data.replace('小强:12本','小强:11本')
+            new_data+=data
+with open(r"C:\Users\123\Desktop\新建文件夹\book.txt","w""utf-8") as jj:
+    jj.write(new_data)
+vwith open(r"C:\Users\123\Desktop\新建文件夹\book.txt","r""utf-8") as jj:
+    a=jj.read()
+    print(a)
+           
+
     # jj.write("小强:12本")
     # jj.write("小强:12本")
     # jj.write("李明:15本")
     # jj.write("李明:15本")
     # jj.close()
     # jj.close()
\ No newline at end of file