auto save

diy.py

@@ -9,12 +9,21 @@
 #filel.close()
 
 
-file = open(r'C:\Users\Administrator\Desktop\book.txt','a',encoding='utf-8')
-file.write('小强:10本\n')
-file.write('李明:15本\n')
-file.close()
+#file = open(r'C:\Users\Administrator\Desktop\book.txt','a',encoding='utf-8')
+#file.write('小强:10本\n')
+#file.write('李明:15本\n')
+#file.close()
 
 
-with open(r'C:\Users\Administrator\Desktop\book.txt','a',encoding='utf-8') as file:
-    file.write('小强本:10\n')
-    file.write('小明本:15\n')
+#with open(r'C:\Users\Administrator\Desktop\book.txt','a',encoding='utf-8') as file:
+    #file.write('小强本:10\n')
+    #file.write('小明本:15\n')
+
+
+
+with open(r'C:\Users\Administrator\Desktop\book.txt','r',encoding='utf-8') as filel:
+    for date in filel:
+        if'小强:12本' in data:
+            print('小强数据在文件中')
+        if'小兰:12本'in data:
+            print('小兰数据在文件中')
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