def get_unconfirmed_tx(api_code=None):
resource = '<STR_LIT>'<EOL>if api_code is not None:<EOL><INDENT>resource += '<STR_LIT>' + api_code<EOL><DEDENT>response = util.call_api(resource)<EOL>json_response = json.loads(response)<EOL>return [Transaction(t) for t in json_response['<STR_LIT>']]<EOL>
Get a list of currently unconfirmed transactions.

    :param str api_code: Blockchain.info API code (optional)
    :return: an array of :class:`Transaction` objects