Removed obsolete comment.

# Wrapper for loading templates from storage of some sort (e.g. filesystem, database).

#

# This uses the TEMPLATE_LOADERS setting, which is a list of loaders to use.

# Each loader is expected to have this interface:

#

#    callable(name, dirs=[])

#

# name is the template name.

# dirs is an optional list of directories to search instead of TEMPLATE_DIRS.

#

# The loader should return a tuple of (template_source, path). The path returned

# might be shown to the user for debugging purposes, so it should identify where

# the template was loaded from.

#

# A loader may return an already-compiled template instead of the actual

# template source. In that case the path returned should be None, since the

# path information is associated with the template during the compilation,

# which has already been done.

#

# Each loader should have an "is_usable" attribute set. This is a boolean that

# specifies whether the loader can be used in this Python installation. Each

# loader is responsible for setting this when it's initialized.

#

# For example, the eggs loader (which is capable of loading templates from

# Python eggs) sets is_usable to False if the "pkg_resources" module isn't

# installed, because pkg_resources is necessary to read eggs.

import warnings

from django.core.exceptions import ImproperlyConfigured