Use SQL like operator on the filter expression with Looker API

I’m trying to access Looker explore via Looker API (using python) with the below filter expression:

{‘browser__page_url' : "^%www.abcd.com^%"}

and getting error 500

the syntax should be equivalent to the below sql condition: 

where browser__page_url like ‘%www.abcd.com%’

I used Looker syntax from here:

https://cloud.google.com/looker/docs/filter-expressions