On 2012-11-21 16:27, MRAB wrote:> On 2012-11-21 16:04, hfo...@gmail.com
wrote:
>> On Wednesday, November 21, 2012 3:48:07 PM UTC, MRAB wrote:
>>> On 2012-11-21 14:59, saikari78 wrote:
>>>> Hi,
>>>>
>>>> I'm using the json module to create a JSON string, then
>>>> inserting that string into a html template containing a javascript
>>>> function (from the highcharts library: http://www.highcharts.com/)
>>>>
>>>> The json string I'm trying to create is to initialize a data
>>>> variable in the javascript function, that has the following example
>>>> format.
>>>>
>>>> data = [{ y: 55.11, color: colors[0], drilldown: { name: 'MSIE
>>>> versions', categories: ['MSIE 6.0', 'MSIE 7.0', 'MSIE 8.0', 'MSIE
>>>> 9.0'], data: [10.85, 7.35, 33.06, 2.81], color: colors[0] } }]
>>>>
>>>> However, I don't know how to do that because dictionary keys in
>>>> python need to be strings. If I try to do the following, Python,of
>>>> course, complains that y,color,drilldown, etc are not defined.
>>>>
>>>>
>>>> import json
>>>>
>>>> data = [ { y:55.11, color:colors[0], drilldown:{name: 'MSIE
>>>> versions',categories: ['MSIE 6.0', 'MSIE 7.0', 'MSIE 8.0', 'MSIE
>>>> 9.0'],data: [10.85, 7.35, 33.06, 2.81],color: colors[0] }} ]
>>>>
>>>> data_string = json.dumps(data)
>>>>
>>>>
>>>> Many thanks for any suggestions on how to do this.
>>>>
>>> Just quote them:
>>> data = [ { 'y':55.11, 'color':colors[0], 'drilldown':{'name': 'MSIE
>>> versions', 'categories': ['MSIE 6.0', 'MSIE 7.0', 'MSIE 8.0', 'MSIE
>>> 9.0'],'data': [10.85, 7.35, 33.06, 2.81],'color': colors[0] }} ]
>>>
>>> Incidentally, dictionary keys in Python don't have to be strings,
>>> but merely 'hashable', which includes integers, floats and tuples
>>> amongst others.
>>
>> Thanks for your reply, but the javascript function expects option
>> names to be unquoted, otherwise it won't work.
>
> Both Python source code and JSON require the dictionary keys to be
> quoted, so using the json module to generate JavaScript code isn't
> going to give you what you want.
>
> It shouldn't be too difficult to write a simple function to do it,
> considering the limited range of types.
>
Here's such a function:
def dump_javascript(data):
if isinstance(data, dict):
items = []
for key, value in data.items():
items.append(key + ": " + dump_javascript(value))
return "{" + ", ".join(items) + "}"
elif isinstance(data, list):
items = []
for value in data:
items.append(dump_javascript(value))
return "[" + ", ".join(items) + "]"
else:
return json.dumps(data)
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