save project

wu hu.py

-sb=open(r"C:\Users\燕子红\Desktop\123.txt","w",encoding="utf-8")
-sb.write("小兰:12\n")
-sb.write("小丽:11\n")
-sb.write("李文:9\n")
-sb.write("张伟:16\n")
-sb.close()
+# sb=open(r"C:\Users\燕子红\Desktop\123.txt","w",encoding="utf-8")
+# sb.write("李文:9本\n")
+# sb.write("张伟:16本\n")
+# sb.close()
+# sb=open(r"C:\Users\燕子红\Desktop\123.txt","a",encoding="utf-8")
+# sb.write("小丽:12本\n")
\ No newline at end of file
+# sb.close()
+with open(r"C:\Users\燕子红\Desktop\123.txt","a",encoding="utf-8") as sb:
+    sb.write("小兰：12本\n")
+    sb.write("小强：12本\n")
+    sb.write("李明：15本\n")
\ No newline at end of file