Python基础教程实践2,画幅好画（win7，64位系统）

一、下载reportlab

• 下载地址http://www.reportlab.com/ftp/
• 下载reportlab-2.5.win32-py2.7.exe

二、获取数据源

由于宿舍没有网络，只能能先下载好txt，然后放到虚拟机linux，里面的apache服务器里面，以此来实现。下载地址http://www.swpc.noaa.gov/ftpdir/weekly/Predict.txt

三、代码

Sunspots_roto.py

from urllib import urlopenfrom reportlab.graphics.shapes import *from reportlab.graphics.charts.lineplots import LinePlotfrom reportlab.graphics.charts.textlabels import Labelfrom reportlab.graphics import renderPDFURL='http://192.168.177.128/Predict.txt'COMMENT_CHAR ='#:'drawing = Drawing(400,200)data = []for line in urlopen(URL).readlines():    if not line.isspace() and not line[0] in COMMENT_CHAR:        data.append([float(n) for n in line.split()])        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)drawing.add(String(250,150,'Sunspots',                   fontSize=14,fillColor=colors.red))renderPDF.drawToFile(drawing,'report2.pdf','Sunspots')

三、实现效果