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:")
+        i-=1
+        print("温馨提示+你还有+str(i)+次机会")
         if name == username and password == userpassword:
         if name == username and password == userpassword:
             print("登录成功!")
             print("登录成功!")
             break
             break
@@ -13,4 +17,6 @@ while True:
         if password!=userpassword:
         if password!=userpassword:
             print("密码错误请重新登陆")
             print("密码错误请重新登陆")
             coutinue
             coutinue
+else:
+    exit()        
 print("欢迎来到贝尔编程!")
 print("欢迎来到贝尔编程!")