save project

diy.py

+new_data=''
+filel=open(r"C:\Users\dell\Desktop\新建文本文档.txt",'w',encoding='utf-8')
+filel.write("小兰: 12本\n")
+filel.write("小丽: 11本\n")
+filel.write("李文: 9本\n")
+filel.write("张伟: 16本\n")
+filel.close()
+
+file=open(r"C:\Users\dell\Desktop\新建文本文档.txt",'a',encoding='utf-8')
+file.write("小强: 10\n")
+file.write("李明: 15\n")
+file.close()
+
+with open(r"C:\Users\dell\Desktop\新建文本文档.txt",'r',encoding='utf-8') as file1:
+    for date in file1:
+        if "小强: 10本" in data:
+            print("小强在数据文件中")
+        if "小兰: 12本" in data:
+            print("小兰在数据文件中")