save project

diy2.py

 username = "python"
 username = "python"
 userpassword = "123456"
 userpassword = "123456"
+1=3
 while True:
 while True:
     name = input("请输入用户名:")
     name = input("请输入用户名:")
     password = input("请输入密码:")
     password = input("请输入密码:")
-    if name == username and password == userpassword:
-        print("登录成功!")
-        break
-    if username != name :
-        print("用户名错误!请重新输入")
-    elif:
-        print("密码错误!请重新输入")
-    if userpassword != password :
-        print("密码错误!请重新输入")
+    1-=1
+    if 1>0 :
+        if  == username and password == userpassword:
+            print("登录成功!")
+            break
+        if username != name  :
+            print("用户名错误!请重新输入")
+            i-=1
+            continue
+        if userpassword != password :
+            print("密码错误!请重新输入")
+            
+    else:
+
 print("欢迎来到贝尔编程!")
 print("欢迎来到贝尔编程!")
\ No newline at end of file