Gazelle code to Alterys

[Kardasz]

I received this code from someone who wrote it in Gazelle. I am trying to make it work in Alteryx. Can anyone help with that.

sum(reduce(map_values(map_filter(impressions_by_platform, (k, v) -> k like '%_only_tv')), 0, (s, x) -> s + x, s -> s)) total_tv_impressions