为什么这个简单的django代码不起作用？

Question

为什么这段代码不起作用？

from django.template import Template,Context
t = Template('Hello , {{name}}')
for name in ('Jack' , 'Sara' , 'John'):
    print t.render(Context({'name' : name})) 

Answer 1

如果您直接在本机Python解释器会话中键入此内容，则无效;实际上它引发了ImproperlyConfigured例外：

In [4]: t = Template('Hello , {{name}}')
ERROR: An unexpected error occurred while tokenizing input
The following traceback may be corrupted or invalid
The error message is: ('EOF in multi-line statement', (38, 0))

---------------------------------------------------------------------------
ImproperlyConfigured                      Traceback (most recent call last)
...

ImproperlyConfigured: Requested setting TEMPLATE_DEBUG, but settings are
not configured. You must either define the environment variable
DJANGO_SETTINGS_MODULE or call settings.configure() before accessing settings.

另一方面，如果你run your shell session using django-admin.py or manage.py commands正确加载了所需的设置，它确实有效。