save project

diy2.py

 username = "python"
 username = "python"
 userpassword = "123456"
 userpassword = "123456"
+i=3
 while True:
 while True:
+    if i>0:
         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:
         if name == username and password == userpassword:
@@ -8,6 +10,13 @@ while True:
             break
             break
         if username != name:
         if username != name:
             print("用户名错误！")
             print("用户名错误！")
+            i -= 1
+            print("您还有",i,"次输入机会")
         elif password != userpassword:
         elif password != userpassword:
             print("密码错误！")
             print("密码错误！")
+            i -= 1
+            print("您还有",i,"次输入机会")
+    else:
+        print("登录次数受限")
+        exit()
 print("欢迎来到贝尔编程!")
 print("欢迎来到贝尔编程!")