save project

diy2.py

 username = "python"
 userpassword = "123456"
-    i = 3
-    while True:
-        if i>0
+i = 3
+while True:
+    if i>0:
         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
-        if name != username
+        if name != username:
            i-=1
-            print("用户名错误，请重新输入")
+            print("用户名错误，请重新输入!")
         if name != username
-           continue
            i-=1
-            print("密码错误，请重新输入")
+            print("密码错误，请重新输入!")
+            continue
     else:
         print("次数达到上限")
         exit()