python使用reportlab画图示例（含中文汉字）

准备工作

开发环境：python2.6，reportlab

准备中文字体文件：simsun.ttc

代码：

#!/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的类型，
#每一个数据点是一个元组
#一条曲线对应一个存储数据点元组的元组
#一个图形可以包含多条曲线，用列表存储曲线元组
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 #坐标轴中心坐标
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()
#若需要显示中文，需要先注册一个中文字体
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()