# How do I use a smart Inventory to get Windows Hosts? **URL:** \ **Category:** AWX Project\ **Tags:** windows\ **Created:** [April 25, 2021, 11:36pm UTC](https://forum.ansible.com/t/how-do-i-use-a-smart-inventory-to-get-windows-hosts/35048 "2021-04-25T23:36:50Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![Brandon\_Ellis](https://avatars.discourse-cdn.com/v4/letter/b/dec6dc/32.png) [@Brandon\_Ellis](https://forum.ansible.com/u/Brandon_Ellis)\ **Post date:** [April 25, 2021, 11:36pm UTC](https://forum.ansible.com/t/how-do-i-use-a-smart-inventory-to-get-windows-hosts/35048/1 "2021-04-25T23:36:50Z")
I’m still new to the Tower interface and I’m having trouble understanding the smart inventory filters What kind of filter would I need to make to only grab “Windows” machines? I noticed that the “variables” section of each host has a key-pair “platform”: “windows” Would I just be checking if “variables” contains “platform”: “windows”? It seems really messy… ![smartinventory.png](https://us1.discourse-cdn.com/ansible/original/2X/8/8968236e0258f3f01f84086f8ee7157e93ce4eff.png) ---
**Author:** ![Brandon\_Ellis](https://avatars.discourse-cdn.com/v4/letter/b/dec6dc/32.png) [@Brandon\_Ellis](https://forum.ansible.com/u/Brandon_Ellis)\ **Post date:** [April 25, 2021, 11:46pm UTC](https://forum.ansible.com/t/how-do-i-use-a-smart-inventory-to-get-windows-hosts/35048/2 "2021-04-25T23:46:19Z")
Never mind, even if I do try that, I get the error: Invalid query variables\_\_contains=“platform”: “windows” ---
**Author:** ![Brandon\_Ellis](https://avatars.discourse-cdn.com/v4/letter/b/dec6dc/32.png) [@Brandon\_Ellis](https://forum.ansible.com/u/Brandon_Ellis)\ **Post date:** [April 25, 2021, 11:46pm UTC](https://forum.ansible.com/t/how-do-i-use-a-smart-inventory-to-get-windows-hosts/35048/3 "2021-04-25T23:46:36Z")
Is there a better way to filter by OS?