Logging

Links

• Logging HOWTO

  • Basic Logging Tutorial

  • Advanced Logging Tutorial

  • Logging Levels

Module-Level Logger

A convention is to use a module-level logger as follows:

import logging
_logger = logging.getLogger(__name__)

Log variable Data

Logging uses the old “%-style” of string formatting. Also see:

• Logging variable data

• Old string formatting

• printf-style String Formatting

Example:

_logger.warning("%s before you %s', 'Look', 'leap!")

Root Logger Configuration

The easiest way to configure the root logger works like this:

import logging
logging.basicConfig(format="%(levelname)s:%(message)s", level=logging.DEBUG)

Change Logger Level

Example:

logging.getLogger("module").setLevel(logging.DEBUG)