Simple python logs with file rotation

Notes

• Arguments for all classes are declared as OPTIONAL
  • arguments takes priority over environment variables
• If any .env variable is omitted, it falls back to default values here: settings.py
• Timezone parameter can also accept localtime, default to UTC
  • This parameter is only to display the timezone datetime inside the log file
  • For timed rotation, only UTC and localtime are supported, meaning it will rotate at UTC or localtime
    • env variable to change between UTC and localtime is LOG_ROTATE_AT_UTC and default to True
• Streamhandler parameter will add stream handler along with file handler
• Showlocation parameter will show the filename and the line number where the message originated

Install

pip install pythonLogs

BasicLog

• Setup Logging
  • This is just a basic log, it does not use any file

from pythonLogs import BasicLog
logger = BasicLog(
    level="debug",
    name="app",
    timezone="America/Sao_Paulo",
    showlocation=False,
).init()
logger.warning("This is a warning example")

Example of output

[2024-10-08T19:08:56.918-0300]:[WARNING]:[app]:This is a warning example

SizeRotatingLog

• Setup Logging
  • Logs will rotate based on the file size using the maxmbytes variable
  • Rotated logs will have a sequence number starting from 1: app.log_1.gz, app.log_2.gz
  • Logs will be deleted based on the daystokeep variable, defaults to 30

from pythonLogs import SizeRotatingLog
logger = SizeRotatingLog(
    level="debug",
    name="app",
    directory="/app/logs",
    filenames=["main.log", "app1.log"],
    maxmbytes=5,
    daystokeep=7,
    timezone="America/Chicago",
    streamhandler=True,
    showlocation=False
).init()
logger.warning("This is a warning example")

Example of output

[2024-10-08T19:08:56.918-0500]:[WARNING]:[app]:This is a warning example

TimedRotatingLog

• Setup Logging
  • Logs will rotate based on when variable to a .gz file, defaults to midnight
  • Rotated log will have the sufix variable on its name: app_20240816.log.gz
  • Logs will be deleted based on the daystokeep variable, defaults to 30
  • Current 'when' events supported:
    • midnight — roll over at midnight
    • W{0-6} - roll over on a certain day; 0 - Monday

from pythonLogs import TimedRotatingLog
logger = TimedRotatingLog(
    level="debug",
    name="app",
    directory="/app/logs",
    filenames=["main.log", "app2.log"],
    when="midnight",
    daystokeep=7,
    timezone="UTC",
    streamhandler=True,
    showlocation=False
).init()
logger.warning("This is a warning example")

Example of output

[2024-10-08T19:08:56.918-0000]:[WARNING]:[app]:This is a warning example

Env Variables (Optional)

LOG_LEVEL=DEBUG
LOG_TIMEZONE=America/Chicago
LOG_ENCODING=UTF-8
LOG_APPNAME=app
LOG_FILENAME=app.log
LOG_DIRECTORY=/app/logs
LOG_DAYS_TO_KEEP=30
LOG_STREAM_HANDLER=True
LOG_SHOW_LOCATION=False
LOG_DATE_FORMAT=%Y-%m-%dT%H:%M:%S

# SizeRotatingLog
LOG_MAX_FILE_SIZE_MB=10

# TimedRotatingLog
LOG_ROTATE_WHEN=midnight
LOG_ROTATE_AT_UTC=True

Source Code

Build

poetry build -f wheel

Run Tests and Get Coverage Report using Poe

poetry update --with test
poe test

License

Released under the MIT License

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