P.S. *Val K*, If I do like that in controller and in js as you told all 
work. *Thank you!* But I don't understant why I need use json.loads twice...
>
>
>    - 
>
> import json
        a = json.loads(request.vars.data)
        a = json.loads(a)
        cgCount = len(a.get('fac'))


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