根据网上搜寻的，加上自己的理解，简单是实现了基于python2.7.5和django1.4的动态验证码
后台生成验证码的python代码写入views.py，
注意：导入PIL下的Image, ImageDraw, ImageFont，需安装PIL的插件，我使用的是PIL-1.1.7.win32-py2.7，附件中有
代码如下：
#获取校验码，并返回给浏览器 def getCheckCodeImage(request): try: import Image import ImageDraw import ImageFont except ImportError: from PIL import Image, ImageDraw, ImageFont #验证码的长度 clength = 4 #获取到验证码的值 code_dict = initCheckCodeVal(clength) #取出列表类型的验证码值 rand_list = code_dict['clist'] #取出字符串类型的验证码值 rand_str = code_dict['cstr'] #设置字体,需设置的字体包simsun.ttc与python源码同级目录 font = ImageFont.truetype('simsun.ttc',random.randint(18,25)) #Image背景颜色 bg_color = (255,255,255) #Image的长和宽 i_width,i_height = clength*20,30 #初始化Image对象 im = Image.new('RGB',(i_width,i_height),bg_color) draw = ImageDraw.Draw(im) for i in range(0,clength): in_x = 10+i*10+random.randint(1,7) in_y = random.randint(2,15) draw.text((in_x,5), rand_list[i],font=font,fill=(0,0,0)) #随机设置干扰线 for i in range(0,3): linecolor = (random.randint(0,255),random.randint(0,255),random.randint(0,255)) #都是随机的 x1 = random.randint(0,10) x2 = random.randint(i_width-10,i_width) y1 = random.randint(5,i_height-5) y2 = random.randint(5,i_height-5) draw.line([(x1, y1), (x2, y2)], linecolor) del draw #将验证码转换成小写的，并保存到session中 request.session['checkcode'] = rand_str.lower() buf = StringIO.StringIO() #将image信息保存到StringIO流中 im.save(buf, 'gif') return HttpResponse(buf.getvalue(),'image/gif') #获取验证码的值 def initCheckCodeVal(length=4): codes = ['0','2','3','4','5','6','7','8','9', 'a','b','c','d','e','f','g','h','i','j', 'k','m','n','o','p','q','r','s','t','u', 'v','w','x','y','z','A','B','C','D','E', 'F','G','H','I','J','K','L','M','N','O', 'P','Q','R','S','T','U','V','W','X','Y', 'Z'] code_list = [] code_str = '' for i in range(0,length): temp = codes[random.randint(0,59)] code_list.append(temp) code_str+=temp return {'clist':code_list,'cstr':code_str}
获取验证码url路径配置，urls.py
url(r'^msg/checkCodeImage/$', 'mysite.views.getCheckCodeImage',name='check code')
网页上使用img标签加载图片
页面效果如下图：
本人初学python和django，如有错误地方望高手多多指点
