save project

diy2.py

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