save project

diy2.py

 username = "python"
 username = "python"
 userpassword = "123456"
 userpassword = "123456"
+i=0
 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:")
+    i+=1
+    if i==3:
+        print("次数已用完")
+        exit()
+    else:
         if name == username and password == userpassword:
         if name == username and password == userpassword:
             break
             break
         if name != username:
         if name != username:
-        print("用户名错误")
+            print("您还有"+str(3-i)+"次机会")
             continue
             continue
         if password != userpassword:
         if password != userpassword:
-        print("密码错误")
+            print("您还有"+str(3-i)+"次机会")
             continue
             continue
-    print("用户名和密码错误!请重新输入")
+    
 print("欢迎来到贝尔编程!")
 print("欢迎来到贝尔编程!")