mirror of https://github.com/Kozea/pygal.git
Python to generate nice looking SVG graph
http://pygal.org/
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
153 lines
2.8 KiB
153 lines
2.8 KiB
Output |
|
====== |
|
|
|
pygal can generate multiple output formats. |
|
|
|
|
|
SVG |
|
--- |
|
|
|
String |
|
~~~~~~ |
|
|
|
The obvious output is the vectorial output in svg format: |
|
|
|
.. code-block:: python |
|
|
|
chart = pygal.Line() |
|
... |
|
chart.render() # Return the svg as bytes |
|
|
|
|
|
It can be rendered as unicode when specifying ``is_unicode=True`` or when ``disable_xml_declaration`` is used |
|
|
|
.. code-block:: python |
|
|
|
chart = pygal.Line() |
|
... |
|
chart.render(is_unicode=True) # Return the svg as a unicode string |
|
|
|
|
|
File |
|
~~~~ |
|
|
|
|
|
You can also write the chart to a file using ``render_to_file``: |
|
|
|
.. code-block:: python |
|
|
|
chart = pygal.Line() |
|
... |
|
chart.render_to_file('/tmp/chart.svg') # Write the chart in the specified file |
|
|
|
|
|
PNG |
|
--- |
|
|
|
With cairosvg installed you can directly get the png file using ``render_to_png``: |
|
|
|
.. code-block:: python |
|
|
|
chart = pygal.Line() |
|
... |
|
chart.render_to_png('/tmp/chart.png') # Write the chart in the specified file |
|
|
|
In case of rendered image turning up black, installing lxml, tinycss and cssselect should fix the issue. |
|
|
|
|
|
Etree |
|
----- |
|
|
|
|
|
It is possible to get the xml etree root element of the chart (or lxml etree node if lxml is installed) by calling the ``render_tree`` method: |
|
|
|
|
|
.. code-block:: python |
|
|
|
chart = pygal.Line() |
|
... |
|
chart.render_tree() # Return the svg root etree node |
|
|
|
|
|
Base 64 data URI |
|
---------------- |
|
|
|
You can directly output a base 64 encoded data uri for <embed> or <image> inclusion: |
|
|
|
|
|
.. code-block:: python |
|
|
|
chart = pygal.Line() |
|
... |
|
chart.render_data_uri() # Return `data:image/svg+xml;charset=utf-8;base64,...` |
|
|
|
|
|
Browser |
|
------- |
|
|
|
With lxml installed you can use the ``render_in_browser`` method to magically make your chart appear in you default browser. |
|
|
|
.. code-block:: python |
|
|
|
chart = pygal.Line() |
|
... |
|
chart.render_in_browser() |
|
|
|
|
|
PyQuery |
|
------- |
|
|
|
If pyquery is installed you can get the pyquery object wrapping the chart by calling ``render_pyquery``: |
|
|
|
(This is mainly used for testing) |
|
|
|
.. code-block:: python |
|
|
|
chart = pygal.Line() |
|
... |
|
chart.render_pyquery() # Return pyquery object |
|
|
|
|
|
Flask App |
|
-------------- |
|
|
|
If you are using pygal in a flask app the ``render_response`` may come in handy: |
|
|
|
.. code-block:: python |
|
|
|
@app.route('/charts/line.svg') |
|
def line_route(): |
|
chart = pygal.Line() |
|
... |
|
return chart.render_response() |
|
|
|
An other way is to use a Base 64 data URI for your flask app. |
|
|
|
In python file: |
|
|
|
.. code-block:: python |
|
|
|
@app.route('/charts/') |
|
def line_route(): |
|
chart = pygal.Line() |
|
... |
|
chart = chart.render_data_uri() |
|
|
|
return render_template( 'charts.html', chart = chart) |
|
|
|
In HTML file: |
|
|
|
.. code-block:: html |
|
|
|
<!-- Don't forget the "|safe"! --> |
|
<div id="chart"> |
|
<embed type="image/svg+xml" src= {{ chart|safe }} /> |
|
</div> |
|
|
|
|
|
|
|
|
|
Django response |
|
--------------- |
|
|
|
Same thing for django with ``render_django_response``.
|
|
|