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'
-file=open(r'D:\Backup\桌面\test.txt','a',encoding='utf-8')
-file.write('小兰:12本')
+with open (r'D:\Backup\桌面\test.txt','r',encoding='utf-8')as file:
+   #file.read('小兰:12本\n')
+   #file.read('小强:10本\n')
+   #file.read('李明:15本\n')
+   for data in file:
+      if '小强:10本' in data:
+         print('数据在文件中')
+#with open(r'D:\Backup\桌面\test.txt','a',encoding='utf-8')as file:   
+   # file.write('小强:12本\n')
+   # file.write('李明:15本\n')
 
-#with open(r'D:\Backup\桌面\test.txt','a',encoding='utf-8')as file：    
-    #file.write('小强:12本')
-    #file.write('李明:15本')