Skip to main content

The Logrus is a collection of random utility functions

Project description


License GitHub stars Code Climate Issue Count

Table of Contents

The logrus is a collection of random utility functions. Nothing in here is all that special, they're just yet another implementation of functions I've rewritten at every job to use in various utility scripts. By open sourcing them now, I'm hoping to not have to write them yet again.

And yes, the name is from Zelazny's Amber series.


pip install thelogrus


Apache 2.0 license.

Included Commands


Takes a value in seconds either from stdin or as arg 1 and converts it to a more meat-friendly format using the humanTime function.

human-time 1234 will print "20 minutes, 34 seconds"

Included functions



Creates a git-style driver command. If your script is named foo, and is run as foo bar baz and there is an executable in your $PATH named foo-bar, it will call foo-bar with baz as the command-line argument.

unfound is an optional argument that should be a function pointer and will be called if exec_subcommand can't find a suitable subcommand. Mainly useful for you to have a custom usage message.

Example usage:

#!/usr/bin/env python3
# Test script for thelogrus
# Confirms that thelogrus.cli.exec_subcommand works as expected
# Copyright 2019, Joe Block <>

import sys
from thelogrus.cli import exec_subcommand

def _usage(message):
  Custom usage printer
  print("%s" % sys.argv[0])
  print("Called as %s" % (' '.join(sys.argv)))
  print("Oh look, a custom usage message.")
  print("Attempted to find an executable using all the permutations of %s with no luck." % '-'.join(sys.argv))
  print("%s" % message)

if __name__ == '__main__':


Given a list ['foo','bar', 'baz'], attempts to create a command name in the format foo-bar-baz. If that command exists, we run it. If it doesn't, we check to see if foo-bar exists, in which case we run foo-bar baz. We keep slicing chunks off the end of the command name and adding them to the argument list until we find a valid command name we can run.

This allows us to easily make git-style command drivers where for example we have a driver script, foo, and subcommand scripts foo-bar and foo-baz, and when the user types foo bar foobar we find the foo-bar script and run it as foo-bar foobar

Example usage:

#!/usr/bin/env python3

import os
import subprocess
import sys
from thelogrus.cli import find_subcommand

def subcommander_driver():
  Process the command line arguments and run the appropriate subcommand.

  We want to be able to do git-style handoffs to subcommands where if we
  do `foo blah foo bar` and the executable foo-blah-foo exists, we'll call
  it with the argument bar.

  We deliberately don't do anything with the arguments other than hand
  them off to the foo subcommand. Subcommands are responsible for their
  own argument parsing.
    (command, args) = find_subcommand(sys.argv)

    # If we can't construct a subcommand from sys.argv, it'll still be able
    # to find this driver script, and re-running ourself isn't useful.
    if os.path.basename(command) == sys.argv[0]:
      print("Could not find a subcommand for %s" % ' '.join(sys.argv))
  except Exception as e:
  subprocess.check_call([command] + args)

if __name__ == '__main__':


Search for a given program in $PATH, and return True if it exists and is executable.


Runs a command (either a str or list) and returns its stdout.


getCustomLogger(name, logLevel)

Returns a custom logger with nicely formatted output.



Takes a value in seconds, returns it in meat-friendly format. humanFriendlyTime(8675309) would return "100 days 9 hours 48 minutes 29 seconds".



os module doesn't have a mkdir -p equivalent so added one.

obfuscateString(snippet, showLength=5, smear='*')

Takes a string, chops off showLength characters from the beginning and end and replaces everything else with the smear character. Really only useful for displaying just enough of a credential in a log to show it's using the correct credential, but not revealing the actual credential.


Return a dict that is all the dict_args squashed together.


readYamlFile(path: str)

Return the data structure contained in a YAML file

Args: path (str): Path to read from

Returns: Data decoded from YAML file content

writeYamlFile(path: str, data)

Writes a data structure or object into a YAML file

Args: path (str): Path to data file data (any): Data to convert and write

Project details

Download files

Download the file for your platform. If you're not sure which to choose, learn more about installing packages.

Source Distribution

thelogrus-0.7.0.tar.gz (13.0 kB view hashes)

Uploaded source

Built Distribution

thelogrus-0.7.0-py3-none-any.whl (14.9 kB view hashes)

Uploaded py3

Supported by

AWS AWS Cloud computing and Security Sponsor Datadog Datadog Monitoring Fastly Fastly CDN Google Google Download Analytics Microsoft Microsoft PSF Sponsor Pingdom Pingdom Monitoring Sentry Sentry Error logging StatusPage StatusPage Status page