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YouConfigMe helps you manage config in a pythonic way

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YouConfigMe helps you manage config in a pythonic way.

Core ideas

Explicit is better than implicit

There are several ways to define configuration variables, with different levels of explicitness. I prefer to go as close as possible to the Twelve Factor App guide since it's what most people expect anyways.

Defaults are reasonable

Sometimes you might need a variable to exist even if it hasn't been defined. So, you should be able to provide defaults.

Types are inherent to the variable

Most of the time, variables are defined as strings, on .ini files or as env vars. But what if your variable is an int? You should be able to get it as an int.

Sections are good

Config sections are a good thing: separate your config vars under reasonable namespaces.


The main motivation for youconfigme to exist is that most simple config libraries do not take sections into account. And it bugs me greatly.


Clone this repo, and install it.

pip install .

Or from PyPI.

pip install YouConfigMe


Start by cloning the repo/forking it.

You should install YouConfigMe's dev packages to help.

pip install .[dev]
pip install .[test]

After that, install the pre-commit hooks:

pre-commit install

This will install several code formatting tools and set them up to run before commits. Also, it will run tests before pushing.

You might find nox quite useful to run tests and ensure linting is as expected.


The docs are updated on pushed tags using GitHub Actions.

Version bumping

This project uses bump to quickly bump versions. By default running bump will bump the patch version. You can bump minor/major versions like so:

bump --minor
bump --major


The tests folder contains several tests that run using pytest that should give you an idea of how to use this.

Config discovery

The preferred order should be:

  1. Environment variables
  2. Config file
  3. Default value


Assume you have an .ini file at the root of your project that looks like this:



You can use it like this:

from youconfigme import AutoConfig
import os

os.environ["A_KEY4"] = "key4value"
os.environ["A_KEY7"] = "key7value"
config = AutoConfig()

print(config.a.key1())				# returns '1'
print(config.a.key1(cast=int))			# returns 1
print(config.a.key2(default='default2val'))	# returns '2'
print(config.a.key3())				# raises ConfigItemNotFound
print(config.a.key3(default='key3value'))	# return 'key3value'
print(config.a.key4())				# returns 'key4value'
print(config.a.key7())				# returns 'key7value'

Since version 0.9.0, YCM supports toml files as well.

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