auto save

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'
 # 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'
-file1=open(r'C:\Users\kk\Desktop\test.txt','w',encoding='utf-8')
-file1.write('小兰：12本')
-file1.close()
+#file1=open(r'C:\Users\kk\Desktop\test.txt','w',encoding='utf-8')
+#file1.write('小兰：12本')
+#file1.close()
\ No newline at end of file
+
+#with open(r'C:\Users\kk\Desktop\test.txt','r',encoding='utf-8') as file1:
+    #a=file1.read()
+    #print(a)
+
+with open(r'C:\Users\kk\Desktop\test.txt','r',encoding='utf-8') as file1:
+    for data in file1:
+        if '小强:10本'in data:
+            print('数据在文件中')
+
+
+