[web2py] How to disable escaping in @service

[dlypka]

I need something like
@service.json(escape=false) in my service:

@service.json
def mytasks(a, b):
    R = '{"completed_in":0.163,"max_id":
112677442623246336,"max_id_str":"112677442623246336","next_page":"?
page=2&max_id=112677442623246336&q=miami&...}]'
    return R

The problem for me is that this is returning a string with \ infront
of each double quote,
which is not what I want.

Any suggestions?