use strict;
use warnings;
use JSON;

print decode_json('{"num": 1.e-2}')->{'num'};

$ perl jsontest.pl 
malformed number (no digits after decimal point), at character offset 10 (before "e-2}") at jsontest.pl line 5.

>>> import json
>>> json.loads('{"num":1.0e-2}')
{u'num': 0.01}
>>> json.loads('{"num":1e-2}')
{u'num': 0.01}
>>> json.loads('{"num":1.e-2}')
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/usr/local/Cellar/python/2.7.2/lib/python2.7/json/__init__.py", line 326, in loads
    return _default_decoder.decode(s)
  File "/usr/local/Cellar/python/2.7.2/lib/python2.7/json/decoder.py", line 366, in decode
    obj, end = self.raw_decode(s, idx=_w(s, 0).end())
  File "/usr/local/Cellar/python/2.7.2/lib/python2.7/json/decoder.py", line 382, in raw_decode
    obj, end = self.scan_once(s, idx)
ValueError: Expecting , delimiter: line 1 column 8 (char 8)

{
  "name" : "sqrt",
  "value" : [[0, 0.3],[1, 1], [2, 1.414], [3, 1.73], [4, 2]]
}

  function plot_async() {
    var url = 'data.json';
    var d = loadJSONDoc(url);
    var gotData = function (data) {
    var layout = new Layout("bar");
      layout.addDataset(data.name, data.value);
      layout.evaluate();

    var chart = new SweetCanvasRenderer($("chart"), layout);
    chart.render();  
    };
    var dataFetchFailed = function (err) {
      alert("data not found");
    };
    d.addCallbacks(gotData, dataFetchFailed);
  }