pyya - Simple tool that converts YAML configuration files to Python objects

Features

Very lightweight and simple API (currently it contains only one function)
Easy to use
Based on popular and well-tested libraries (like camel-converter, PyYAML and munch)
Automatically merge default and production configuration files
Convert keys in configuration files to snake_case

Installation

pip install pyya

Or download a specific version from Releases page and install it with:

pip install /path/to/pyya-[version]-py3-none-any.whl

Usage

Example

Create YAML configuration files for your project:

# default.config.yaml - this file usually goes to version control system
database:   
    host: localhost
    port: 5432
    username: postgres
    password: postgres

redis:
    host: localhost
    port: 6379

# config.yaml - this file for production usage
database:   
    username: username
    password: password

Import configuration files in your Python code with pyya:

import json

from pyya import init_config

config = init_config(
    'config.yaml', 'default.config.yaml', 
    merge_configs = True,
    sections_ignored_on_merge = ['redis'], # do not include redis on your config
    convert_keys_to_snake_case = False,
    add_underscore_prefix_to_keywords = False
    raise_error_non_identifiers = False)
print(json.dumps(config))

# Output:
# {database: {"host": "localhost", "port": 5432, "username": "username", "password": "password"}}

As you can see, pyya automatically merges default config file with production config file.

Under the hood pyya uses PyYAML to parse YAML files and munch library to create attribute-stylish dictionaries.

Flags

# merge default and production configuration files
# setting to `False` disables other flags and makes default config optional
# `False` means "open config file and apply `ymal.safe_load` and `munchify` with no formatting"
merge_configs=True

# list of sections to ignore when merging configs
# it is useful when you have examples in your default config but do not want to have in the main one
sections_ignored_on_merge: Optional[List[str]] = None

# convert `camelCase` or `PascalCase` keys to `snake_case`
convert_keys_to_snake_case=True

# add underscore prefix to keys that are Python keywords
add_underscore_prefix_to_keywords=True

# raise error if key name is not valid Python identifier
raise_error_non_identifiers=True

Contributing

Are you a developer?

Fork the repository https://github.com/shadowy-pycoder/pyya/fork
Clone the repository: git clone https://github.com/<your-username>/pyya.git && cd pyya
Create your feature branch: git switch -c my-new-feature
Commit your changes: git commit -am 'Add some feature'
Push to the branch: git push origin my-new-feature
Submit a pull request