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')

巴特西

reportlab使用示例：文字和图片

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