最近在用Python开发自己的博客，需要用到Python生成验证码，当然肯定要用到Python的图形处理库PIL，因为我用的是windows。

所以在安装好pil之后就开始写，就按照题目所说出现了The _imagingft C module is not installed 错误，找了很多建议，最后确定在windows下应该用pillpw。下载地址 点击打开链接 找到 Pillow‑2.5.2.win32‑py2.7.exe因为我用的是python2.7和win32系统，所以就应该下载这个,大家可以根据自己的需求找到响应的包进行安装， Pillow, 它是对PIL的一些BUG修正后的编译版

到了这里又遇见一个错误，那就是在使用Image.save('code.jpg','jpg')的时候会出现KeyError:’jpg‘错误，

看*文章 http://*.com/questions/21128256/why-does-pillow-not-recognize-the-jpeg-format

受到启发之后只需要把import Image改为 from PIL import Image 就行了

顺便附上一个生产中文验证码的代码

import ImageDraw,ImageFont

from PIL import Image

import random

import math, string  

class RandomChar():

  @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 = 'simsun.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,'jpeg')

if __name__=='__main__':

  ic = ImageChar(fontColor=(100,211, 90))

  ic.randChinese(4)

  ic.save("1.jpeg")