save project

diy4.py

+with open(r'C\Users\CM\Desktop\book.txt','r',encoding='uft-8')as file1:
+    for data in file1:
+        if '小强：10本' in data:
+            print("小强数据在文件库中")
+        if '小兰：12本' in data:
+            print("小兰数据在文件库中")
+with open(r'C\Users\CM\Desktop\book.txt','w',encoding='uft-8')as file1:
+    file1.write(new_data)
+with open(r'C\Users\CM\Desktop\book.txt','r',encoding='uft-8')as file1:
+    a=file1.read()
+    print(a)
\ No newline at end of file