Python图片处理PIL/pillow/生成验证码/出现KeyError: 和The _imagingft C module is not installed

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　　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stackoverflow文章 http://stackoverflow.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")