urllib获取太阳黑子图表程序

 1 # -*- coding:utf-8 -*- 2 # Author:Vincent Zhang 3 ?4 from urllib.request import urlopen 5 from reportlab.graphics.shapes import * 6 from reportlab.graphics.charts.lineplots import LinePlot 7 from reportlab.graphics.charts.textlabels import Label 8 from reportlab.graphics import renderPDF 9 10 URL = ‘ftp://ftp.swpc.noaa.gov/pub/weekly/Predict.txt‘11 COMMENT_CHARS = ‘#:‘12 drawing = Drawing(400, 200)13 data = []14 for line in urlopen(URL).readlines():15 ????line = line.decode()16 ????if not line.isspace() and line[0] not in COMMENT_CHARS:17 ????????data.append([float(n) for n in line.split()])18 pred = [row[2] for row in data]19 high = [row[3] for row in data]20 low = [row[4] for row in data]21 times = [row[0] + row[1] / 12.0 for row in data]22 lp = LinePlot()23 lp.x = 5024 lp.y = 5025 lp.height = 12526 lp.width = 30027 lp.data = [list(zip(times, pred)),28 ???????????list(zip(times, high)),29 ???????????list(zip(times, low))]30 lp.lines[0].strokeColor = colors.blue31 lp.lines[1].strokeColor = colors.red32 lp.lines[2].strokeColor = colors.green33 drawing.add(lp)34 drawing.add(String(250, 150, ‘Sunspots‘,35 ???????????????????fontSize=14, fillColor=colors.red))36 renderPDF.drawToFile(drawing, ‘report2.pdf‘, ‘Sunspots‘)