Errors/Python

No Handlers Could Be Found for Logger

No handlers could be found for logger 'myapp'

Quick Answer

The logger has no handlers configured. Call logging.basicConfig() or add handlers to your logger.

Why This Happens

Python's logging module requires at least one handler. Without configuration, log messages are silently dropped.

The Problem

import logging
logger = logging.getLogger('myapp')
logger.info('Starting...')  # No output

The Fix

import logging
logging.basicConfig(level=logging.INFO)
logger = logging.getLogger('myapp')
logger.info('Starting...')

Step-by-Step Fix

  1. 1

    Call basicConfig()

    Call logging.basicConfig(level=logging.INFO) at startup.

  2. 2

    Add handlers

    Add StreamHandler for console or FileHandler for files.

  3. 3

    Set log level

    Use logger.setLevel() to control message visibility.

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