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')

相关阅读:
ASP.NET Repeater-重复器
ADO.NET数据库访问技术
类库和委托、 is 和as
小知识
多态
封装和继承
资源管理器
简易计算器
小知识点
jquery cookie页面传值和jquery监听页面刷新

原文地址：https://www.cnblogs.com/chenjianhong/p/4144741.html