save project

j.py

 username="python"
 username="python"
 userpassword="123456"
 userpassword="123456"
+i=3
 while True:
 while True:
-    name=input("请输入用户名")
-    password=input("请输入账号")
-    if username==name and userpassword==password:
-        print("密码正确")
-        break
-    elif userpassword!=password:
-        print("用密码错误")
-    else:
-        print("用户名错误")
+    if not i==0:
+        name=input("请输入用户名")
+        password=input("请输入账号")
+        if username==name and userpassword==password:
+            print("密码正确")
+            break
+        if userpassword!= password:
+            print("用密码错误")
+            continue
\ No newline at end of file
+        if username!=name:
+            print("用户名错误")
+        else:
+            print("封锁")
+            exit()
+print("欢迎")