1.安装django-simple-captcha库
pip install django-simple-captcha
Attempting uninstall: Django
Found existing installation: Django 2.1.8
Uninstalling Django-2.1.8:
Successfully uninstalled Django-2.1.8
ERROR: Could not install packages due to an EnvironmentError: [WinError 145] 目录不是空的。: ‘D:\Program Files (x86)\Python38\Lib\site-packages\django\~-ntri
b\flatpages\locale\fa’
又报错，简直要怀疑人生了
试下：
apt-get -y install libz-dev libjpeg-dev libfreetype6-dev python -dev
也是不行的
解决方法：
先执行 pip install Pillow，再执行pip install django-simple-captcha
就会安装成功：