url(r'^', include(('app.urls',"app"),namespace='app')),

url(r'^verifycode/$',views.verifycode,name='verifycode'),

• package安装

pip install pillow

• 视图函数

注意字体路径，改成自己的

def verifycode(request):
    # 引入绘图模块
    from PIL import Image, ImageDraw, ImageFont
    # 引入随机函数模块
    import random
    # 定义变量用于画面的背景色、宽、高

    bgcolor = (random.randrange(20, 100), random.randrange(20, 100), random.randrange(20, 100))

    width = 100
    height = 50

    # 创建画面对象
    im = Image.new('RGB', (width, height), bgcolor)
    # 创建画笔对象

    draw = ImageDraw.Draw(im)

    # 调用画笔的point()函数绘制噪点
    for i in range(0, 100):
        xy = (random.randrange(0, width),
              random.randrange(0, height))
        fill = (random.randrange(0, 255), 255, random.randrange(0, 255))
        draw.point(xy, fill)
    # 定义验证码的备选值
    str = '1234567890ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz'

    # 随机选取4个值作为验证码
    rand_str = ''
    for i in range(0, 4):
        rand_str += str[random.randrange(0, len(str))]

    # 构造字体对象
    font = ImageFont.truetype('C:\Windows\Fonts\SCRIPTBL.TTF', 40)

    # 构造字体颜色
    fontcolor = (255, random.randrange(0, 255), random.randrange(0, 255))

    # 绘制4个字
    draw.text((5, 2), rand_str[0], font=font, fill=fontcolor)
    draw.text((25, 2), rand_str[1], font=font, fill=fontcolor)
    draw.text((50, 2), rand_str[2], font=font, fill=fontcolor)
    draw.text((75, 2), rand_str[3], font=font, fill=fontcolor)

    # 释放画笔
    del draw

    # 存入session，用于做进一步验证
    request.session['verifycode'] = rand_str

    # 内存文件操作
    import io
    buf = io.BytesIO()

    # 将图片保存在内存中，文件类型为png
    im.save(buf, 'png')

    # 将内存中的图片数据返回给客户端，MIME类型为图片png
    return HttpResponse(buf.getvalue(), 'image/png')

<img src="{% url 'app:verifycode' %}">

• https://www.youtube.com/watch?v=nfyEQxoDuwI&list=PLwDQt7s1o9J4tPc5OA56lisigi8s13IGb&index=45

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