python练习二—画幅好画

#! /usr/bin/env pyton
# -*- coding=utf-8 -*-

from reportlab.lib import colors
from reportlab.graphics.shapes import *
from reportlab.graphics import renderPDF
from reportlab.graphics.charts.lineplots import LinePlot
from reportlab.graphics.charts.textlabels import Label
data = [
    #    Year  Month  Predicted  High  Low
        (2007,  8,    113.2,     114.2, 112.2),
        (2007,  9,    112.8,     115.8, 109.8),
        (2007, 10,    111.0,     116.0, 106.0),
        (2007, 11,    109.8,     116.8, 102.8),
        (2007, 12,    107.3,     115.3,  99.3),
        (2008,  1,    105.2,     114.2,  96.2),
        (2008,  2,    104.1,     114.1,  94.1),
        (2008,  3,     99.9,     110.9,  88.9),
        (2008,  4,     94.8,     106.8,  82.8),
        (2008,  5,     91.2,     104.2,  78.2),
        ]
# 初始化画布大小
drawing = Drawing(400, 200)

pred = [row[2] for row in data]
high = [row[3] for row in data]
low = [row[4] for row in data]
times = [row[0] + row[1]/12.0 for row in data]


lp = LinePlot()
lp.x = 50
lp.y = 50
lp.height = 125
lp.width = 300
lp.data = [zip(times, pred), zip(times, high), zip(times, low)]
lp.lines[0].strokeColor = colors.blue
lp.lines[1].strokeColor = colors.red
lp.lines[2].strokeColor = colors.green

drawing.add(lp)

renderPDF.drawToFile(drawing, ‘sunspots.pdf‘,‘sunspot‘)