python使用reportlab畫圖樣本

python使用reportlab畫圖樣本

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準備工作

 

開發環境：python2.6，reportlab

 

準備中文字型檔：simsun.ttc

 

代碼：

 

 

代碼如下:

#!/usr/bin/env python2.6

#coding:utf-8

 

import traceback

 

from reportlab.graphics.shapes import Drawing

from reportlab.graphics.charts.lineplots import LinePlot

from reportlab.graphics.charts.textlabels import Label

from reportlab.graphics import renderPDF

from reportlab.graphics.widgets.markers import makeMarker

from reportlab.pdfbase import pdfmetrics, ttfonts

 

#注意data的類型，

#每一個資料點是一個元組

#一條曲線對應一個儲存資料點元組的元組

#一個圖形可以包含多條曲線，用列表格儲存體曲線元組

data=[((1,100),(2,200),(3,300),(4,400),(5,500)),((1,50),(2,80),(3,400),(4,40),(5,70))]

 

drawing = Drawing(500, 300)

 

lp = LinePlot()

lp.x = 50 #座標軸中心座標

lp.y = 30

lp.height = 250

lp.width = 400

lp.data = data

lp.joinedLines = 1

lp.lines.symbol = makeMarker('FilledCircle')

 

lp.xValueAxis.valueMin = 1

lp.xValueAxis.valueMax = 5

lp.xValueAxis.valueStep = 1

 

lp.yValueAxis.valueMin = 0

lp.yValueAxis.valueMax = 500

lp.yValueAxis.valueStep = 100

drawing.add(lp)

 

title = Label()

#若需要顯示中文，需要先註冊一個中文字型

pdfmetrics.registerFont(ttfonts.TTFont("haha", "simsun.ttc"))

title.fontName   = "haha"

title.fontSize   = 12

title_text = unicode('你好','gbk')

#title_text = "abc"

title._text = title_text

title.x          = 250

title.y          = 280

title.textAnchor ='middle'

drawing.add(title)

 

Xlabel = Label()

Xlabel._text = 'x'

Xlabel.fontSize   = 12

Xlabel.x          = 480

Xlabel.y          = 30

Xlabel.textAnchor ='middle'

drawing.add(Xlabel)

 

Ylabel = Label()

Ylabel._text = "y"

Ylabel.fontSize   = 12

Ylabel.x          = 40

Ylabel.y          = 295

Ylabel.textAnchor ='middle'

drawing.add(Ylabel)

 

try:

     drawing.save(formats=['gif'],outDir=".",fnRoot="abc")

except:

     traceback.print_exc()