save project

diy2.py

 username = "python"
 username = "python"
 userpassword = "123456"
 userpassword = "123456"
 while True:
 while True:
-    name = input("请输入用户名:")
-    password = input("请输入密码:")
-    if name == username and password == userpassword:
-        print("登录成功!")
-        break
-    if username != name:
-        print("用户不存在！请重新输入")
-        continue
-    if  userpassword !=  password:
-        print(密码错误！请重新输入)    
-print("欢迎来到贝尔编程!")
+    if i>0:
+        name = input("请输入用户名:")
+        password = input("请输入密码:")
+        if name == username and password == userpassword:
+            print("登录成功!")
+            print("欢迎来到贝尔编程!")
+            break
+        if username != name:
+            print("用户不存在！请重新输入")
+            continue
+        if  userpassword !=  password:
\ No newline at end of file
+            print(密码错误！请重新输入)    
+    else:
+        print("以后再来")       
+        break