#python项目练习二：画幅好画

#python操作PDF

from urllib import urlopen
from reportlab.graphics.shapes import *
from reportlab.graphics.charts.legends import *
from reportlab.graphics.charts.textlabels import *
from reportlab.graphics import renderPDF
url=''
COMMENT_CHAT='#'
drawing=Drawing(400,200)
data=[]
for line in urlopen(url).readlines():
    if not line.isspace() and not line[0] in COMMENT_CHAT:
        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]
from reportlab.graphics.charts.lineplots import LinePlot
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)
drawing.add(String(250,150,'Sunspots',fontSize=14,filllColr=colors.red))
renderPDF.drawToFile(drawing,'report3.pdf','Sunspots')

这是我的错误 ，那位朋友帮看下，如何解决下

  File "G:/py_py/python_object_xyz/obj_python/python_pdf.py", line 16, in <module>
    data.append([float(n) for n in line.split()])
ValueError: could not convert string to float: <!DOCTYPE

管理员在2009年8月13日编辑了该文章文章。