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from pygal.base import BaseGraph
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class Line(BaseGraph):
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"""Line graph"""
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def _draw(self):
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vals = [val for serie in self.series for val in serie.values]
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ymin, ymax = min(vals), max(vals)
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x_step = len(self.series[0].values)
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x_pos = [x / float(x_step - 1) for x in range(x_step)
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] if x_step != 1 else [.5] # Center if only one value
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y_pos = self._pos(
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ymin, ymax, self.y_scale) if not self.y_labels else map(
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int, self.y_labels)
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x_labels = self.x_labels and zip(self.x_labels, x_pos)
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y_labels = zip(map(str, y_pos), y_pos)
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self._compute_margin(x_labels, y_labels)
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self.svg.set_view(ymin, ymax)
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self.svg.make_graph()
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self.svg.x_axis(x_labels)
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self.svg.y_axis(y_labels)
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self.svg.legend([serie.title for serie in self.series])
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self.svg.title()
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for serie in self.series:
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self.svg.line(
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self.svg.serie(serie.index), [
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(x_pos[i], v)
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for i, v in enumerate(serie.values)])
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