安装pygal，可参阅：pip和pygal的安装实例教程
基本XY线：
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import pygalfrom math import cos"""XY线是将各个点用直线连接起来的折线图需提供一个横纵坐标元组作为元素的列表"""xy_chart = pygal.XY()xy_chart.title = 'XY Cosinus'xy_chart.add('x = cos(y)', [(cos(x / 10.), x / 10.) for x in range(-50, 50, 5)])xy_chart.add('y = cos(x)', [(x / 10., cos(x / 10.)) for x in range(-50, 50, 5)])xy_chart.add('x = 1', [(1, -5), (1, 5)])xy_chart.add('x = -1', [(-1, -5), (-1, 5)])xy_chart.add('y = 1', [(-5, 1), (5, 1)])xy_chart.add('y = -1', [(-5, -1), (5, -1)])xy_chart.render_to_file('bar_chart.svg') |
散点图：
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import pygalxy_chart = pygal.XY(stroke=False)xy_chart.title = 'Correlation'xy_chart.add('A', [(0, 0), (.1, .2), (.3, .1), (.5, 1), (.8, .6), (1, 1.08), (1.3, 1.1), (2, 3.23), (2.43, 2)])xy_chart.add('B', [(.1, .15), (.12, .23), (.4, .3), (.6, .4), (.21, .21), (.5, .3), (.6, .8), (.7, .8)])xy_chart.add('C', [(.05, .01), (.13, .02), (1.5, 1.7), (1.52, 1.6), (1.8, 1.63), (1.5, 1.82), (1.7, 1.23), (2.1, 2.23), (2.3, 1.98)])xy_chart.render_to_file('bar_chart.svg') |
日期：
你可以使用日期模块绘制与日期有关的图表
DateTime
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import pygalfrom datetime import datetimedatetimeline = pygal.DateTimeLine( x_label_rotation=35, truncate_label=-1, x_value_formatter=lambda dt: dt.strftime('%d, %b %Y at %I:%M:%S %p'))datetimeline.add("Serie", [ (datetime(2013, 1, 2, 12, 0), 300), (datetime(2013, 1, 12, 14, 30, 45), 412), (datetime(2013, 2, 2, 6), 823), (datetime(2013, 2, 22, 9, 45), 672)])datetimeline.render_to_file('bar_chart.svg') |
Date
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import pygalfrom datetime import datedateline = pygal.DateLine(x_label_rotation=25)dateline.x_labels = [ date(2013, 1, 1), date(2013, 7, 1), date(2014, 1, 1), date(2014, 7, 1), date(2015, 1, 1), date(2015, 7, 1)]dateline.add("Serie", [ (date(2013, 1, 2), 213), (date(2013, 8, 2), 281), (date(2014, 12, 7), 198), (date(2015, 3, 21), 120)])dateline.render_to_file('bar_chart.svg') |
Time
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import pygalfrom datetime import timedateline = pygal.TimeLine(x_label_rotation=25)dateline.add("Serie", [ (time(), 0), (time(6), 5), (time(8, 30), 12), (time(11, 59, 59), 4), (time(18), 10), (time(23, 30), -1),])dateline.render_to_file('bar_chart.svg') |
TimeDelta
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import pygalfrom datetime import timedeltadateline = pygal.TimeDeltaLine(x_label_rotation=25)dateline.add("Serie", [ (timedelta(), 0), (timedelta(seconds=6), 5), (timedelta(minutes=11, seconds=59), 4), (timedelta(days=3, microseconds=30), 12), (timedelta(weeks=1), 10),])dateline.render_to_file('bar_chart.svg') |
总结
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原文链接：http://www.cnblogs.com/keqipu/p/7283340.html
