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GUI for Python's logging module

Project description


This is a graphical log viewer for Python’s standard logging module. It can be targeted with a SocketHandler with no additional setup (see Usage).

The program is in beta: it’s lacking some features and may be unstable, but it works. cutelog is cross-platform, although it’s mainly written and optimized for Linux.


  • Allows any number of simultaneous connections

  • Customizable look of log levels and columns, with presets for each

  • Filtering based on level and namespace, as well as filtering by searching

  • Search through all records or only through filtered ones

  • View exception tracebacks or messages in a separate window

  • Dark theme (with its own set of colors for levels)

  • Pop tabs out of the window, merge records of multiple tabs into one

  • Save/load records to/from a file in JSON format


If you’re using Linux, install PyQt5 (or PySide2) from your package manager before installing cutelog (package name is probably python3-pyqt5 or python-pyqt5). Or just run pip install pyqt5 to install it from pip, which is sub-optimal.

$ pip install --upgrade cutelog

Or install the latest development version from the source:

$ pip install git+


  • Python 3.5 (or newer)

  • PyQt5 (preferably 5.6 or newer) or PySide2

  • QtPy


  1. Start cutelog

  2. Put the following into your code:

import logging
from logging.handlers import SocketHandler

log = logging.getLogger('Root logger')
log.setLevel(1)  # to send all messages to cutelog
socket_handler = SocketHandler('', 19996)  # default listening address
log.addHandler(socket_handler)'Hello world!')

Afterwards it’s recommended to designate different loggers for different parts of your program with log_2 = log.getChild(“Child logger”). This will create “log namespaces” which allow you to filter out messages from various subsystems of your program.

Code, issues, changelog

Visit the project’s GitHub page.

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