save project

diy2.py

+i=3
+username = "python"
+userpassword = "123456"
+while True:
+       if i>0:
+            name = input("请输入用户名:")
+            password = input("请输入密码:")
+            i=i-1
+            if name == username and password == userpassword:
+                print("登录成功!")
+                break
+            if name !=username:
+            print: ("错误") 
+            print("机会"+str(i)+"次")  
+            if password !=userpassword:
+            print: ("错误")   
+    print("用户名和密码错误!请重新输入")
+            print("机会"+str(i)+"次") 
+        else:
+            print("已锁定")
+            exit()
+print("欢迎来到贝尔编程!")