save project

diy2.py

-username = "python"
-userpassword = "123456"
+username = "3"
+userpassword = "10203040506070809090807060504030201024680"
 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!")
+    a = input("请输入用户名:")
+    b = input("请输入密码:")
+    if a == username and b == userpassword:
         break
-    if name!=username:
-    print("用户名和密码错误!请重新输入")
-    if password!=userpassword:
-       print("账号错")
-    if password!=username:
-       print("密码错")
+        print("登录成功!")
+    else:
+        pass        
+        if a!=username:
+            print("用户名和密码错误!请重新输入")
+            continue
+        if a !=userpassword:
+            print("账号错")
+        if b != userpassword:
+            print("密码错")
 print("欢迎来到贝尔编程!")
\ No newline at end of file