auto save

a.py

+file1 = open(r"C:\Users\Administrator\Desktop\book.txt","r",encoding = "utf-8")
+file1.write("小兰:12本，小丽:11本，李文:9本，张伟:16本")
+for i in file1:
+    if "李文:9本" in i:
+        i = i.replace("李文:9本","李文:10本")
+        print("i")
\ No newline at end of file