save project

diy.py

-file1= open(r'C:\book.txt','w',encoding='utf-8')
-file1.write('小强:10本\n')
-file1.write('李明:15本\n')
-file1.close()
-
 with open(r'C:\book.txt','w',encoding='utf-8') as file:
-    file1.write('小强:10本\n')
-    file1.write('李明:15本\n')
+    for data in file1:
+        if '小强:10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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