__init__.py 文件源码

def get_comment_app():
    """
    Get the comment app (i.e. "django.contrib.comments") as defined in the settings
    """
    # Make sure the app's in INSTALLED_APPS
    comments_app = get_comment_app_name()
    if comments_app not in settings.INSTALLED_APPS:
        raise ImproperlyConfigured("The COMMENTS_APP (%r) "\
                                   "must be in INSTALLED_APPS" % settings.COMMENTS_APP)

    # Try to import the package
    try:
        package = import_module(comments_app)
    except ImportError as e:
        raise ImproperlyConfigured("The COMMENTS_APP setting refers to "\
                                   "a non-existing package. (%s)" % e)

    return package