templates是Django指定的T目录，pycharm下templates的图标会变亮，static则可以改动。下面STATIC_URL可以指定，STATICFILES_DIRS则指定了templates的html文件的{% static 'css/style.css' %}寻址。

# Static files (CSS, JavaScript, Images)

# https://docs.djangoproject.com/en/1.11/howto/static-files/

STATIC_URL = '/static/'

STATICFILES_DIRS = [

    os.path.join(BASE_DIR, "static")

]

在templates的html文件中引入静态资源(js,css)

{% load staticfiles %}

......

<link href="{% static 'css/style.css' %}" rel="stylesheet" type="text/css" />

environ是一个字符串所对应环境的映像对象，类似于Windows的系统环境变量。Django之下默认根目录为项目根目录。

查看os.environ下有什么

import os

for i, v in enumerate(os.environ.items(), 1):

    print(i, v)

manage.py

#!/usr/bin/env python

import os

import sys

if __name__ == "__main__":

    os.environ.setdefault("DJANGO_SETTINGS_MODULE", "LcvSearch.settings")

    try:

        from django.core.management import execute_from_command_line

    except ImportError:

        # The above import may fail for some other reason. Ensure that the

        # issue is really that Django is missing to avoid masking other

        # exceptions on Python 2.

        try:

            import django

        except ImportError:

            raise 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?"

            )

        raise

    execute_from_command_line(sys.argv)

所以当要非项目文件使用Django的模型时就要配置环境变量，记得先引入环境变量。

import os

os.environ.setdefault("DJANGO_SETTINGS_MODULE", "djblog.settings")