Loguru

• GitHub

• import and send a log message straight to terminal

from loguru import logger

logger.debug("That's it, beautiful and simple logging!")

• want to add a log file as well as sending to stdout? simply pass the path to the file and it will append or create if it doesnt exist

logger.add("app.log")

• you can also use variable components:

logger.add("file_{time}.log")

• Additionally handlers and criteria once this are filtered through this:

logger.add(sys.stderr, format="{time} {level} {message}", filter="my_module", level="INFO")

• catch exceptions

@logger.catch
def my_function(x, y, z):
  # An error? It's caught anyway!
  return 1 / (x + y + z)

• back tracing and diagnosis of errors can also be added to a log file with a few additional kwargs:

logger.add("out.log", backtrace=True, diagnose=True)

• Add custom fields and bind them to values you desire and want to compute

logger.add("file.log", format="{extra[ip]} {extra[user]} {message}")
context_logger = logger.bind(ip="192.168.0.1", user="someone")
context_logger.info("Contextualize your logger easily")
context_logger.bind(user="someone_else").info("Inline binding of extra attribute")
context_logger.info("Use kwargs to add context during formatting: {user}", user="anybody")