def format_task

def format_task_error()

in luigi/notifications.py [0:0]
52 lines of code
8 McCabe index (conditional complexity)

def format_task_error(headline, task, command, formatted_exception=None):
    """
    Format a message body for an error email related to a luigi.task.Task

    :param headline: Summary line for the message
    :param task: `luigi.task.Task` instance where this error occurred
    :param formatted_exception: optional string showing traceback

    :return: message body
    """

    if formatted_exception:
        if len(formatted_exception) > email().traceback_max_length:
            truncated_exception = formatted_exception[:email().traceback_max_length]
            formatted_exception = f"{truncated_exception}...Traceback exceeds max length and has been truncated."

    if formatted_exception:
        formatted_exception = wrap_traceback(formatted_exception)
    else:
        formatted_exception = ""

    if email().format == 'html':
        msg_template = textwrap.dedent('''
        <html>
        <body>
        <h2>{headline}</h2>

        <table style="border-top: 1px solid black; border-bottom: 1px solid black">
        <thead>
        <tr><th>name</th><td>{name}</td></tr>
        </thead>
        <tbody>
        {param_rows}
        </tbody>
        </table>
        </pre>

        <h2>Command line</h2>
        <pre>
        {command}
        </pre>

        <h2>Traceback</h2>
        {traceback}
        </body>
        </html>
        ''')

        str_params = task.to_str_params()
        params = '\n'.join('<tr><th>{}</th><td>{}</td></tr>'.format(*items) for items in str_params.items())
        body = msg_template.format(headline=headline, name=task.task_family, param_rows=params,
                                   command=command, traceback=formatted_exception)
    else:
        msg_template = textwrap.dedent('''\
        {headline}

        Name: {name}

        Parameters:
        {params}

        Command line:
          {command}

        {traceback}
        ''')

        str_params = task.to_str_params()
        max_width = max([0] + [len(x) for x in str_params.keys()])
        params = '\n'.join('  {:{width}}: {}'.format(*items, width=max_width) for items in str_params.items())
        body = msg_template.format(headline=headline, name=task.task_family, params=params,
                                   command=command, traceback=formatted_exception)

    return body