auto save

diy.py

-with open(r"C:\Users\lenovo\Desktop\text.txt","r",encoding = "utf-8") as a:
-    for i in a:
-        if "小兰：12本" in a:
-            print("数据在文档里")
-        else:
-            print("数据不在文档里")
-
-
+#a = open(r"C:\Users\lenovo\Desktop\text.txt","w",encoding = "utf-8")
+#a.write("小兰：12本\n")
+#a.write("小丽：11本\n")
+# a.write("李文：9本\n")
+#a.write("张伟：16本\n")
+#a.close()
+with open (r"C:\Users\lenovo\Desktop\text.txt",'a',encoding = "utf-8") as a:
+    a.write("小强：12本\n")
+    a.write("李明：15本\n")
\ No newline at end of file