conflex 0.0.0a2

Flexible tree-like configuration reader.

Conflex

Flexible, extensible configuration reader for Python 3.6+ projects for multiple tree-like config sources.

Introduction

Conflex means "flexible configuration" it is a tool for parsing tree-like configuration with any level of depth. Thus, here the configuration is a tree structure with two types of nodes: Section and Option. Sections is used for grouping other nodes and option is a key-value pair. As it mentioned above depth is unlimited, section can have a child sections moreover options can have child options or sections. Checkout the "test/*' files for a more extended examples.

The option can contain list or single value. If list-typed option contains single value it is not cause an error this value will be treated as list with one element.

The input data is dict that contains tree representation for example { section : { key0 : value0, child_section { key00: value00, key01: value01 } } }. YAML and JSON parsers returns that kind of object.

Basic usage

# app/config.py
import conflex


def get_sourse(filename) -> dict:
    """
    Function that returns parsed to`dict` configuration.
    For example:
        {'main': {'master_ip': '192.168.0.1', 'master_port': 42}} 
    """
    ...


def load_config() -> Config:    
    config = Config((
        'main' >> Section() << (
            'master_ip'     << OptValue(iv_default='127.0.0.1'),
            'master_port'   << OptVInt(iv_required=True),
            'packet_size'   << OptVInt(iv_default='1KB') << (
                'source' << OptVChoice(
                    iv_default='conf',
                    il_mapping={'conf': 0, 'arg': 1})
        )))
    )
    sources = []
    sources.append(get_sourse('app_default.conf'))
    sources.append(get_sourse('app.conf'))
    config.load_dicts(sources)
    return config

# app/main.py
from app.config import load_config

SRC_CONF = 0
SRC_ARG = 1

config = load_config()
print(config['main/master_ip'])
sub_config = config.knot('main')
print(sub_config['port'])
if sub_config['packet_size/source'] == SRC_CONF:
    print(sub_config['packet_size'])  # will output `int` 1024
print(dict(config.items()))

Installation

pip install conflex