save project

diy.py

@@ -8,4 +8,145 @@ file1.close()
 
 with open(r"C:\Uses\CM\Desktop\book.txt","w",encoding="utf-8") as file:
     file.write("小兰:12本\n")
-    file.write("李文:9本\n")
\ No newline at end of file
+    file.write("if'小兰:12本' in data:\n")
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+    with open(r"C:\Uses\CM\Desktop\book.txt","w",encoding="utf-8") as file:
+        for data in file1:
+            if'小兰:12本' in data:
+                print('小兰在')
+            if'李文:9本' in data:
+                print('李文在'')
\ No newline at end of file