安装：

　　pip install django-simple-captcha

将 captcha 添加到 settings.py 中的 INSTALLED_APPS

INSTALLED_APPS = [
     'captcha',               
]    

在 url.py 中添加一条路由

urlpatterns = [
    path('captcha/',include('captcha.urls')),
]

生成数据库

python manage.py makemigrations

python manage.py migrate

显示验证码

定义一个form表单

from captcha.fields import CaptchaField

class RegisterForm(forms.Form):
    email = forms.EmailField(required=True)
    password = forms.CharField(required=True,min_length=5)
    # 验证码，字段里面可以自定义错误提示信息
    captcha = CaptchaField()

通过{{ register_form.captcha }}获取验证码

<div class="form-group marb8 captcha1 ">
     <label>验&nbsp;证&nbsp;码</label>
     {{ register_form.captcha }}
</div>