PyGoogleChart
*************


google a écrit une API permettant de générer des graphiques à la volé.

vous pouvez trouver le site d'origine `ici <http://pygooglechart.slowchop.com/>`_

Pour installer ce module rien de plus simple:

* en téléchargeant l'exécutable sur le site de pygooglechart
* en téléchargeant les sources puis en les installant

::

    python setyp.py install

* en utilisant `setuptools <http://pypi.python.org/pypi/setuptools>`_ 

::

    easy_install pygooglechart


PyGoogleChart permet d'obtenir de nombreux types de graphiques:

* pie2D / pie3D
* label
* qrcodes
* scatter
* line

exemple de code permettant la génération de graphique

.. code-block:: python

    from pygooglechart import PieChart3D

    # Create a chart object of 250x100 pixels
    chart = PieChart3D(250, 100)

    # Add some data
    chart.add_data([20, 10])

    # Assign the labels to the pie data
    chart.set_pie_labels(['Hello', 'World'])

    # Print the chart URL
    print chart.get_url()

    # Download the chart
    chart.download('pie-hello-world.png')


.. code-block:: python

    from pygooglechart import Chart
    from pygooglechart import SimpleLineChart
    from pygooglechart import Axis

    # Set the vertical range from 0 to 100
    max_y = 100

    # Chart size of 200x125 pixels and specifying the range for the Y axis
    chart = SimpleLineChart(200, 125, y_range=[0, max_y])

    # Add the chart data
    data = [
        32, 34, 34, 32, 34, 34, 32, 32, 32, 34, 34, 32, 29, 29, 34, 34, 34, 37,
        37, 39, 42, 47, 50, 54, 57, 60, 60, 60, 60, 60, 60, 60, 62, 62, 60, 55,
        55, 52, 47, 44, 44, 40, 40, 37, 34, 34, 32, 32, 32, 31, 32
    ]
    chart.add_data(data)

    # Set the line colour to blue
    chart.set_colours(['0000FF'])

    # Set the vertical stripes
    chart.fill_linear_stripes(Chart.CHART, 0, 'CCCCCC', 0.2, 'FFFFFF', 0.2)

    # Set the horizontal dotted lines
    chart.set_grid(0, 25, 5, 5)

    # The Y axis labels contains 0 to 100 skipping every 25, but remove the
    # first number because it's obvious and gets in the way of the first X
    # label.
    left_axis = range(0, max_y + 1, 25)
    left_axis[0] = ''
    chart.set_axis_labels(Axis.LEFT, left_axis)

    # X axis labels
    chart.set_axis_labels(Axis.BOTTOM, \
        ['Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun'])

    chart.download('line-stripes.png')


.. code-block:: python

    from pygooglechart import QRChart

    # Create a 125x125 QR code chart
    chart = QRChart(125, 125)

    # Add the text
    chart.add_data('Hello, World!')

    # "Level H" error correction with a 0 pixel margin
    chart.set_ec('H', 0)

    # Download
    chart.download('qr-hello.png')