cutelog – GUI for logging

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

It can also be used from other languages or logging libraries with little effort (see the Wiki). For example, a Go library gocutelog shows how to enable regular Go logging libraries to connect to cutelog.

Features

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
Display extra fields under the message with Extra mode
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

Screenshots

Light theme	Dark theme

Installation

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 cutelog

Or install the latest development version from the source (requires PyQt5 to build resources):

$ pip install git+https://github.com/busimus/cutelog.git

Requirements

Python 3.5 (or newer)
PyQt5 (preferably 5.6 or newer) or PySide2
QtPy

Usage

Start cutelog
Put the following into your code:

import logging
from logging.handlers import SocketHandler

log = logging.getLogger('Root logger')
log.setLevel(1)  # to send all records to cutelog
socket_handler = SocketHandler('127.0.0.1', 19996)  # default listening address
log.addHandler(socket_handler)
log.info('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.

Attributions

Free software used:

Qt via either:
- PyQt5 - GPLv3 License, Copyright (c) 2019 Riverbank Computing Limited info@riverbankcomputing.com
- PySide2 - LGPLv3 License, Copyright (C) 2015 The Qt Company Ltd (http://www.qt.io/licensing/)

And thanks to logview by Vinay Sajip for UI inspiration.

Copyright and license

This program is released under the MIT License (see LICENSE file).

naman4-mono / django-cutelog