save project

diy.py

-file=open ("book.txt","a",encoding="utf=8")
-file1.write('小兰:12本/n')
-file1.write('李文:9本/n')
-file1.close()
\ No newline at end of file
+file=open ("book.txt","r",encoding="utf=8")
+for data in file:
+    if '小兰:10本'in data:
+        print('在')
+    else:
+        print('不在')
+    if'小强:12本'in data:
+        print('在')
+    else:
+         print('不在')   
\ No newline at end of file