features.py 文件源码

def compile_template_with_filters(template_string, filters):
    """Compile a Django template, using additional filters.

    This is like Template(template_string) except that additional
    filters to be made available to the template may be specified.

    Normally, one would define filters as documented in [1], but this
    requires the INSTALLED_APPS settings to be set, which is not the
    case in NAV[2]. This function is just a hack to get around that
    limitation. The code is based on
    django.template.compile_string[3].

    filters should be a dictionary mapping filter names to functions.

    [1]: http://docs.djangoproject.com/en/dev/howto/custom-template-tags/
    [2]: https://nav.uninett.no/wiki/devel:django_introduction#settings
    [3]: http://code.djangoproject.com/browser/django/trunk/django/template/__init__.py

    """
    lib = template.Library()
    for name in filters.keys():
        lib.filter(name, filters[name])
    lexer = template.Lexer(template_string, None)
    parser = template.Parser(lexer.tokenize())
    parser.add_library(lib)
    return parser.parse()