这个练习相对简单，主要是对reportlab库的学习调用，看代码
#! /usr/bin/env pyton# -*- coding=utf-8 -*-from reportlab.lib import colorsfrom reportlab.graphics.shapes import *from reportlab.graphics import renderPDFfrom reportlab.graphics.charts.lineplots import LinePlotfrom reportlab.graphics.charts.textlabels import Labeldata = [ # 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 = 50lp.y = 50lp.height = 125lp.width = 300lp.data = [zip(times, pred), zip(times, high), zip(times, low)]lp.lines[0].strokeColor = colors.bluelp.lines[1].strokeColor = colors.redlp.lines[2].strokeColor = colors.greendrawing.add(lp)renderPDF.drawToFile(drawing, 'sunspots.pdf','sunspot')
#zip使用
a = list(1,2)
b = list(3,4)d = zip(a,b)=[(1,3), (2,4)]# 列表和元组
列表是[]，元组是()
列表长度可变，元组不可变# 列表推导式，轻量级循环l = [row for row in rows]
完整代码