save project

diy2.py

+u = "python"
+w = "123456"
+while True:
+    n = input("请输入用户名:")
+    p = input("请输入密码:")
+    if name == username and password == userpassword:
+        print("登录成功!")
+        break
+    if n != u:
+        print('用错')
+        continue
+    if p != w:
+        print('密错')    
+
+print("欢迎来到贝尔编程!")
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