save project

diy2.py

 username = "python"
 username = "python"
 userpassword = "123456"
 userpassword = "123456"
 while True:
 while True:
-    name = input("请输入用户名:")
-    if name!=username:
-        print('用户名错误。')
-        continue
-    password = input("请输入密码:")
-    if password!=userpassword:
-        print('密码错误。')
-        continue
-    if name == username and password == userpassword:
-        print("登录成功!")
-        break
+    while True:
+        name = input("请输入用户名:")
+        if name!=username:
+            print('用户名错误。')
+        elif n==username:
+            break
+        password = input("请输入密码:")
+        if password!=userpassword:
+             print('密码错误。')
+        elif n==userpassword:
+            break
+        if name == username and password == userpassword:
+            print("登录成功!")
+            break
 print("欢迎来到贝尔编程!")
 print("欢迎来到贝尔编程!")
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