save project

diy2.py

+username="python"
+userpassword="123456"
+i=3
+while True:
+    name=input("请输入用户名")
+    password=input("请输入密码")
+    i=i-1
+    if i>0:
+        if name == username and password == userpassword:
+            print("登陆成功")
+            break
+        if name != username:
+            print("用户名错误!请重新输入")
+            print("还有"+str(i)+"次机会")
+            continue
+        if password != userpassword:
+            print("密码错误!请重新输入")
+            print("还有"+str(i)+"次机会")
+    else:
+        print("账户已永久锁定")
+        exit()
+print("欢迎来到贝尔编程")