Google Chart API, HTTP POST request format.

[Tim Harig]

On 2011-01-06, Slie <stackslip at gmail.com> wrote:
[reformated to <80 columns per RFC 1855 guidelines]
> I have read several examples on python post requests but I'm not sure
> mine needs to be that complicated.

>From the HTML example on the page you posted:

    <form action='https://chart.googleapis.com/chart' method='POST'>
        <input type="hidden" name="cht" value="lc"  />
        <input type="hidden" name="chtt" value="This is | my chart"  />
        <input type='hidden' name='chs' value='600x200' />
        <input type="hidden" name="chxt" value="x,y" />
        <input type='hidden' name='chd' value='t:40,20,50,20,100'/>
        <input type="submit"  />
    </form>

you can retreive the same chart from Python:

    Python 3.1.2 (r312:79147, Oct  9 2010, 00:16:06)
    [GCC 4.4.4] on linux2
    Type "help", "copyright", "credits" or "license" for more information.
    >>> import urllib.request, urllib.parse
    >>> params = urllib.parse.urlencode({'cht':'lc', 'chtt':'This is | my
    >>> chart',
    ...         'chs':'600x200', 'chxt':'x,y', 'chd':'t:40,20,50,20,100'})
    >>> chart = urllib.request.urlopen('https://chart.googleapis.com/chart',
    ...         data = params).read()
    >>> chartFile = open("chart.png", 'wb')
    >>> chartFile.write(chart)
    10782
    >>> chartFile.close()