save project

j.py

 username="python"
 username="python"
 userpassword="123456"
 userpassword="123456"
+i=3
 while True:
 while True:
+    if not i==0:
         name=input("请输入用户名")
         name=input("请输入用户名")
         password=input("请输入账号")
         password=input("请输入账号")
         if username==name and userpassword==password:
         if username==name and userpassword==password:
             print("密码正确")
             print("密码正确")
             break
             break
-    elif userpassword!=password:
+        if userpassword!= password:
             print("用密码错误")
             print("用密码错误")
-    else:
+            continue
+        if username!=name:
             print("用户名错误")
             print("用户名错误")
+        else:
+            print("封锁")
+            exit()
+print("欢迎")