auto save

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:")
-    if name == username and password == userpassword:
-        print("登录成功!")
-        break
-    print("用户名和密码错误!请重新输入")
+    if i>0:
+        name = input("请输入用户名:")
+        password = input("请输入密码:")
+        i-=1
+        if name == username and password == userpassword:
+            print("登录成功!")
+            break
+        if username!=name:
+            print("用户名错误，请重新输入")
+            print("你还剩"+str(i)+"次输入机会")
+            continue
+        if userpassword!=password:
+            print("用户密码错误，请重新输入")
+            print("你还剩"+str(i)+"次输入机会")
+    else:
+        print("请带上身份证到我司解锁")
+        exit()
 print("欢迎来到贝尔编程!")
\ No newline at end of file