Python 生成随机中文验证码

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# -*- coding: utf-8 -*-
import Image,ImageDraw,ImageFont
import random
import math,string  

class RandomChar():
  """用于随机生成汉字"""
  @staticmethod
  def Unicode():
    val = random.randint(0x4E00,0x9FBF)
    return unichr(val)  

  @staticmethod
  def GB2312():
    head = random.randint(0xB0,0xCF)
    body = random.randint(0xA,0xF)
    tail = random.randint(0,0xF)
    val = ( head << 8 ) | (body << 4) | tail
    str = "%x" % val
    return str.decode('hex').decode('gb2312')  

class ImageChar():
  def __init__(self,fontColor = (0,0),size = (100,40),fontPath = 'wqy.ttc',bgColor = (255,255,255),fontSize = 20):
    self.size = size
    self.fontPath = fontPath
    self.bgColor = bgColor
    self.fontSize = fontSize
    self.fontColor = fontColor
    self.font = ImageFont.truetype(self.fontPath,self.fontSize)
    self.image = Image.new('RGB',size,bgColor)  

  def rotate(self):
    self.image.rotate(random.randint(0,30),expand=0)  

  def drawText(self,pos,txt,fill):
    draw = ImageDraw.Draw(self.image)
    draw.text(pos,font=self.font,fill=fill)
    del draw  

  def randRGB(self):
    return (random.randint(0,random.randint(0,255))  

  def randPoint(self):
    (width,height) = self.size
    return (random.randint(0,width),height))  

  def randLine(self,num):
    draw = ImageDraw.Draw(self.image)
    for i in range(0,num):
      draw.line([self.randPoint(),self.randPoint()],self.randRGB())
    del draw  

  def randChinese(self,num):
    gap = 5
    start = 0
    for i in range(0,num):
      char = RandomChar().GB2312()
      x = start + self.fontSize * i + random.randint(0,gap) + gap * i
      self.drawText((x,random.randint(-5,5)),RandomChar().GB2312(),self.randRGB())
      self.rotate()
    self.randLine(18)  

  def save(self,path):
    self.image.save(path)
 

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