reportlab使用示例：文字和图片

Python的reportlab专门将数据使用生成PDF中的图形和文档功能，

下载ReportLab

https://pypi.python.org/simple/reportlab/

http://www.reportlab.com/software/opensource/rl-toolkit/download/

生成一个简单的helloworld

from reportlab.graphics.shapes import Drawing, String
from reportlab.graphics import renderPDF

d = Drawing(100, 100)
s = String(50, 50, 'Hello, world!', textAnchor='middle')
d.add(s)

renderPDF.drawToFile(d, 'hello.pdf', 'A simple PDF file')

三条折线

from reportlab.lib import colors
from reportlab.graphics.shapes import *
from reportlab.graphics import renderPDF

data = [
#    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),
    ]

drawing = Drawing(200, 150)

pred = [row[2]-40 for row in data]
high = [row[3]-40 for row in data]
low = [row[4]-40 for row in data]
times = [200*((row[0] + row[1]/12.0) - 2007)-110 for row in data]

drawing.add(PolyLine(zip(times, pred), strokeColor=colors.blue))
drawing.add(PolyLine(zip(times, high), strokeColor=colors.red))
drawing.add(PolyLine(zip(times, low),  strokeColor=colors.green))

drawing.add(String(65, 115, 'Sunspots', fontSize=18, fillColor=colors.red))

renderPDF.drawToFile(drawing, 'report1.pdf', 'Sunspots')

最终的sunspot

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://www.swpc.noaa.gov/ftpdir/weekly/Predict.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:
        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 = 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, fillColor=colors.red))

renderPDF.drawToFile(drawing, 'report2.pdf', 'Sunspots')