templatetags.py 文件源码

def do_loadmacros(parser, token):
    try:
        tag_name, filename = token.split_contents()
    except IndexError:
        m = ("'%s' tag requires at least one argument (macro name)"
            % token.contents.split()[0])
        raise template.TemplateSyntaxError(m)
    if filename[0] in ('"', "'") and filename[-1] == filename[0]:
        filename = filename[1:-1]
    t = get_template(filename)
    macros = t.nodelist.get_nodes_by_type(DefineMacroNode)
    ## Metadata of each macro are stored in a new attribute
    ## of 'parser' class. That way we can access it later
    ## in the template when processing 'usemacro' tags.
    _setup_macros_dict(parser)
    for macro in macros:
        parser._macros[macro.name] = macro
    return LoadMacrosNode()