python生成随机验证码(中文验证码)示例

# -*- 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, 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, txt, font=self.font, fill=fill)
    del draw 

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

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