save project

nb.py

-day =open(r"C:\Users\9\Desktop\test.txt","w",encoding="utf-8")
-day.write("小兰：12本")
-day.write("小丽：11本")
-day.write("李文：9本")
-day.write("张伟：16本")
\ No newline at end of file
+with open(r"C:\Users\9\Desktop\test.txt","w",encoding="utf-8") as day:
+    day.write("：12本\n")
+    day.write("：15本\n")