pygal is a dynamic SVG charting library written in python. All the documentation is on http://pygal.org
It features various graph types:
As simple as:
$ pip install pygal
import pygal # First import pygal
bar_chart = pygal.Bar() # Then create a bar graph object
bar_chart.add('Fibonacci', [0, 1, 1, 2, 3, 5, 8, 13, 21, 34, 55]) # Add some values
bar_chart.render_to_file('bar_chart.svg') # Save the svg to a file