SlackLogger

class composer.loggers.SlackLogger(include_keys=(), formatter_func=None, log_interval='1ba', max_logs_per_message=50, slack_logging_api_key=None, channel_id=None)

Log metrics to slack, using Slack’s postMessage api - https://api.slack.com/methods/chat.postMessage.

First export 2 environment variable to use this logger. 1. SLACK_LOGGING_API_KEY: To get app credentials, follow tutorial here - https://api.slack.com/tutorials/tracks/posting-messages-with-curl?app_id_from_manifest=A053W1QCEF2. 2. SLACK_LOGGING_CHANNEL_ID: Channel id to send the message (Open slack channel in web browser to look this up).

Next write script to output metrics / hparams / traces to slack channel. See example below.

trainer = Trainer(
    model=mnist_model(num_classes=10),
    train_dataloader=train_dataloader,
    max_duration='2ep',
    algorithms=[
        LabelSmoothing(smoothing=0.1),
        CutMix(alpha=1.0),
        ChannelsLast(),
    ],
    loggers=[
        SlackLogger(
            formatter_func=(lambda data: [{
                'type': 'section',
                'text': {
                    'type': 'mrkdwn',
                    'text': f'*{k}:* {v}'
                }
            } for k, v in data.items()]),
            include_keys=['loss/train/total'],
            interval_in_seconds=1
        ),
    ],
)

trainer.fit()

Parameters

• formatter_func ((...) -> Any | None) – A formatter function that returns list of blocks to be sent to slack.

• include_keys (Sequence[str]) – A sequence of metric/logs/traces keys to include in the message.

• log_interval – (int | str | Time): How frequently to log. (default: '1ba')

• max_logs_per_message (int) – 50): Maximum number of logs to send in a single message. Note that no more than 50 items are allowed to send in a single message.

• buffer (If more than 50 items are stored in) –

• interval. (the message flushed without waiting the full time) –