django ImportError 解决方法

在终端使用模板

from django import template
t = template.Template('My name is {{ name }}.')

提示错误 

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/Library/Python/2.7/site-packages/django/template/base.py", line 123, in __init__
    if settings.TEMPLATE_DEBUG and origin is None:
  File "/Library/Python/2.7/site-packages/django/utils/functional.py", line 184, in inner
    self._setup()
  File "/Library/Python/2.7/site-packages/django/conf/__init__.py", line 40, in _setup
    raise ImportError("Settings cannot be imported, because environment variable %s is undefined." % ENVIRONMENT_VARIABLE)
ImportError: Settings cannot be imported, because environment variable DJANGO_SETTINGS_MODULE is undefined.

 

不接 google 然后找到如下答案

If you're playng with Django directly from Python, and not from Django's own manage.py shell, then you need to set the DJANGO_SETTINGS_MODULE variable before launching Python.

For example, if you have a Django project named "myproject", then run the following before launching Python:

export DJANGO_SETTINGS_MODULE=myproject.settings

For Apache to pick up that variable, you need to set it in httpd.conf as follows:

SetEnv DJANGO_SETTINGS_MODULE myproject.settings

 

意思就是 

在命令行下使用python命令进入交互模式的，Template(str)在构照模板的时候依赖django.conf.settings.这个变量，但是在当前的环境中没有这个变量,这时，它就会抛出异常了

 

办法就是 要想使用django的模板你必须导入settings

>>> from django.conf import settings

>>> settings.configure()

你在运行t = Template("my name is {{name}}") 就不会出错了

 

还有一种方法就是使用python manager.py shell运行

 

manager.py在项目目录下

现在就一切正常

 

参考链接  http://iyouf.info/fixed-django-settings-error.html

             http://forum.webfaction.com/viewtopic.php?id=2282