python manage.py在终端上迁移，然后显示错误？

理解PYTHONPATH的好文章：

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你忘记激活虚拟环境了吗？这是错误消息的一部分？这里你有相同问题的答案。。。

Traceback (most recent call last):
  File "manage.py", line 16, in <module>
    "Couldn't import Django. Are you sure it's installed and "
ImportError: Couldn't import Django. Are you sure it's installed and available on your PYTHONPATH environment variable? Did you forget to activate a virtual environment?

export PYTHONPATH="$PYTHONPATH:/home/user/work/your_django_project"