Slack

SlackHandler sends log entries to a Slack channel via incoming webhook. Uses the Python standard library (urllib.request) - no extra dependencies required.

Installation

This integration requires the slack-sdk package.

uv

uv add logly[slack]

pip

pip install "logly[slack]"

uv (without extras)

uv add slack-sdk

pip (without extras)

pip install slack-sdk

Missing Dependency

If slack-sdk is not installed, you'll see:

ModuleNotFoundError: No module named 'slack_sdk'

Usage

from logly import logger
from logly.integrations.slack import SlackHandler

handler = SlackHandler(
    "https://hooks.slack.com/services/...",
    channel="#logs",
    username="Logly Bot",
)
logger.add(handler, level="WARNING")

Constructor Args

Argument	Type	Default	Description
webhook_url	str	""	Slack incoming webhook URL
channel	str | None	None	Channel override for the webhook
username	str | None	None	Username override for the webhook
icon_emoji	str | None	None	Emoji override for the webhook icon
timeout	float	10.0	HTTP request timeout in seconds

Tips

• Use a dedicated Slack channel for production alerts to keep them separate from development noise.
• Set icon_emoji to ":rotating_light:" for critical alerts.

Full Example

from logly import logger
from logly.integrations.slack import SlackHandler

handler = SlackHandler(
    webhook_url="https://hooks.slack.com/services/T00/B00/xxx",
    channel="#ops-alerts",
    username="Logly Alerts",
    icon_emoji=":warning:",
)
logger.add(handler, level="WARNING")

logger.warning("High memory usage detected", usage="87%")
logger.error("Database connection pool exhausted")