save project

diy2.py

+username = "python"
+userpassword = "123456"
+y=3
+while True:
+    if y>0:
+        name=input("请输入用户名:")
+        password=input("请输入密码:")
+        y-=1
+        if name == username: 
+            if password == userpassword:
+                print("登录成功!")
+                break
+            else:
+                print("请重新输入密码")
+                print("还有"+str(y)+"次机会")
+        else:
+            print("请重新输入用户名")
+            print("还有"+str(y)+"次机会")
+    else:
+        print("您的账号已被锁定 ")
+        exit()
+print("欢迎来到贝尔编程!")
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