def babel_extract(fileobj, keywords, comment_tags, options):
    extensions = set()
    for extension in options.get('extensions', '').split(','):
        extension = extension.strip()
        if not extension:
            continue
        extensions.add(import_string(extension))
    if InternationalizationExtension not in extensions:
        extensions.add(InternationalizationExtension)

    def getbool(options, key, default=False):
        options.get(key, str(default)).lower() in ('1', 'on', 'yes', 'true')

    environment = Environment(
        options.get('block_start_string', BLOCK_START_STRING),
        options.get('block_end_string', BLOCK_END_STRING),
        options.get('variable_start_string', VARIABLE_START_STRING),
        options.get('variable_end_string', VARIABLE_END_STRING),
        options.get('comment_start_string', COMMENT_START_STRING),
        options.get('comment_end_string', COMMENT_END_STRING),
        options.get('line_statement_prefix') or LINE_STATEMENT_PREFIX,
        options.get('line_comment_prefix') or LINE_COMMENT_PREFIX,
        getbool(options, 'trim_blocks', TRIM_BLOCKS),
        NEWLINE_SEQUENCE, frozenset(extensions),
        cache_size=0,
        auto_reload=False
    )

    if getbool(options, 'newstyle_gettext'):
        environment.newstyle_gettext = True

    source = fileobj.read().decode(options.get('encoding', 'utf-8'))
    try:
        node = environment.parse(source)
        tokens = list(environment.lex(environment.preprocess(source)))
    except TemplateSyntaxError, e:
        # skip templates with syntax errors
        return

    finder = _CommentFinder(tokens, comment_tags)
    for lineno, func, message in extract_from_ast(node, keywords):
        yield lineno, func, message, finder.find_comments(lineno)


#: nicer import names
Setup the OpenID request
dataset/ETHPy150Open AppScale/appscale/AppServer/lib/jinja2-2.6/jinja2/ext.py/babel_extract--crossover with--dataset/ETHPy150Open omab/python-social-auth/social/backends/ngpvan.py/ActionIDOpenID.setup_request