save project

diy2.py

 username = "python"
 userpassword = "123456"
-i=3
+i=0
 while True:
-    if i>0:
+    if i<3:
         name = input("请输入用户名:")
         password = input("请输入密码:")
-        i=i-1
+        i=i+1
         if name == username and password == userpassword:
             print("登录成功!")
             break
         if name!=username:
             print("用户名不存在，请重新输入！")
-            print("温馨提醒，您还有"+str(i)+"输入机会")
+            print("温馨提醒，您还有"+str(3-i)+"输入机会")
+            continue
         if password!=userpassword:
             print("密码不正确，请重行输入！")
-            print("温馨提醒，您还有"+str(i)+"输入机会")
+            print("温馨提醒，您还有"+str(3-i)+"输入机会")
+            continue
     else:
         print("限定次数已用完！")
         exit()