[web2py] customize json output

[bova]

Hello!

I'm using web2py with jquery and jquery.flot plugin

Tell me please how can I get json output like following:
  [ { label: "Foo", data: [ [10, 1], [17, -14], [30, 5] ] },
    { label: "Bar", data: [ [11, 13], [19, 11], [30, -7] ] } ]