mirror of https://github.com/Kozea/pygal.git
Python to generate nice looking SVG graph
http://pygal.org/
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70 lines
2.3 KiB
70 lines
2.3 KiB
First steps |
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=========== |
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.. caution:: |
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First you need to install pygal, see `installing <../installing.html>`_. |
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When it's done, you are ready to make your first chart: |
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.. code-block:: python |
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import pygal # First import pygal |
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bar_chart = pygal.Bar() # Then create a bar graph object |
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bar_chart.add('Fibonacci', [0, 1, 1, 2, 3, 5, 8, 13, 21, 34, 55]) # Add some values |
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bar_chart.render_to_file('bar_chart.svg') # Save the svg to a file |
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Now you should have a svg file called ``bar_chart.svg`` in your current directory. |
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You can open it with various programs such as your web browser, inkscape or any svg compatible viewer. |
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The resulting chart will be tho following: |
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.. pygal-code:: |
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bar_chart = pygal.Bar() |
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bar_chart.add('Fibonacci', [0, 1, 1, 2, 3, 5, 8, 13, 21, 34, 55]) |
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.. caution:: |
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pygal relies on svg css styling. This is sadly not fully supported by gnome `librsvg <https://wiki.gnome.org/action/show/Projects/LibRsvg>`_ and therefore can lead to black svg being displayed. This is not a bug in pygal. `See this bugzilla search <https://bugzilla.gnome.org/buglist.cgi?bug_status=__open__&content=css%20style&no_redirect=1&order=Importance&product=librsvg&query_format=specific>`_ |
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To make a multiple series graph just add another one: |
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.. pygal-code:: |
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bar_chart = pygal.Bar() |
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bar_chart.add('Fibonacci', [0, 1, 1, 2, 3, 5, 8, 13, 21, 34, 55]) |
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bar_chart.add('Padovan', [1, 1, 1, 2, 2, 3, 4, 5, 7, 9, 12]) |
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If you want to stack them, use `StackedBar` instead of `Bar`: |
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.. pygal-code:: |
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bar_chart = pygal.StackedBar() |
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bar_chart.add('Fibonacci', [0, 1, 1, 2, 3, 5, 8, 13, 21, 34, 55]) |
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bar_chart.add('Padovan', [1, 1, 1, 2, 2, 3, 4, 5, 7, 9, 12]) |
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You can also make it horizontal with `HorizontalStackedBar`: |
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.. pygal-code:: |
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bar_chart = pygal.HorizontalStackedBar() |
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bar_chart.add('Fibonacci', [0, 1, 1, 2, 3, 5, 8, 13, 21, 34, 55]) |
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bar_chart.add('Padovan', [1, 1, 1, 2, 2, 3, 4, 5, 7, 9, 12]) |
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And finally add a title and some labels: |
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.. pygal-code:: |
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bar_chart = pygal.HorizontalStackedBar() |
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bar_chart.title = "Remarquable sequences" |
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bar_chart.x_labels = map(str, range(11)) |
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bar_chart.add('Fibonacci', [0, 1, 1, 2, 3, 5, 8, 13, 21, 34, 55]) |
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bar_chart.add('Padovan', [1, 1, 1, 2, 2, 3, 4, 5, 7, 9, 12]) |
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