save project

diy1.py

-a=open(r"C:\Users\2hao\Desktop\新建文件夹\chen.txt","w",encoding="utf-8")
-a.write("123")
-a.close()
\ No newline at end of file
+with open(r"C:\Users\2hao\Desktop\新建文件夹\chen.txt","r",encoding="utf-8")as file1:
+    for data in file1:
+        if '123' in data:
+            print('数据在文件中')