#!coding=utf-8
from urllib import urlopen
from reportlab.graphics.shapes import *
from reportlab.graphics.charts.lineplots import LinePlot
from reportlab.graphics.charts.textlabels import Label
from reportlab.graphics import renderPDF

URL = 'http://services.swpc.noaa.gov/text/predicted-sunspot-radio-flux.txt'
COMMENT_CHARS = '#:'

drawing = Drawing(400, 200)
data = []
for line in urlopen(URL).readlines():
    if not line.isspace() and not line[0] in COMMENT_CHARS:#isspace() 方法检测字符串是否只由空格组成
        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 ,lp.y = 50,50
lp.width,lp.height = 300,125
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)
drawing.add(String(250,150,'Sunpots',fontSize=14,fillColor=colors.red))
renderPDF.drawToFile(drawing,'report2.pdf','Sunpots')