save project

diy.py

 # 写入同学们的捐赠明细：'小兰12本：'、'小丽：11本'、'李文：9本'、'张伟：16本'
+new_data=""
 with open(r"C:\Users\xmbc\Desktop\text.txt","a",encoding="utf-8") as gvhj:
-    gvhj.write('小丽：11本')
-    gvhj.write('李文：9本')
-    gvhj.write('张伟：16本')
-    gvhj.write('小兰:12本')
+    # gvhj.write('小丽：11本')
+    # gvhj.write('李文：9本')
+    # gvhj.write('张伟：16本')
+    # gvhj.write('小兰:12本')
     for data in gvhj:
-        if"小强:10本" in data:
-            print("数据在文件中")
-        else:
-            print("数据不在文件中") 
+        if'小兰:12本' in data:
+            data=data.replace('小兰:12本','小兰:14本')
+        new_data+=data
+ 
 
    
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