I am trying to run script from action workflow. How to input value from workflow into script for further computation.

Can you share your GitHub Action yaml so we can see the code to try and help?

Looking at the error, it looks like there is no closing curly braces. Every opening curly brace must be closed:

{{ variable }}

not:

{{ variable

But without seeing the full code it's near impossible to help beyond that.

Also, most variables should be prepended with a $. For example, here's how to grab an input:

${{ github.event.inputs.message }}

But again, it's all guess work without seeing the code causing the problem.