btconfig 4.4.4

Module for reading configuration files

Overview

This is a module for reading configuration files.

Currently, the module only supports YAML-formatted files.

Features:

• Retrieve deeply nested values using dot notation, e.g. section1.key1
• Retrieve values using wildcards, e.g. section1.*.key2
• Configuration files can be templated (Jinja)

Prerequisites:

• Python 3.4+

Installation

• From pypi: pip3 install btconfig
• From this git repo: pip3 install git+https://github.com/berttejeda/bert.config.git
  Note: To install a specific version of the library from this git repo,
  suffix the git URL in the above command with @{ tag name }, e.g.:
  git+https://github.com/berttejeda/bert.config.git@3.0.0

Usage Examples

Load a configuration file and retrieve specified key value

Given:

• Config file at /home/myuser/myconfig.yaml
• with contents:
  

section1:
  key1: value1
  key2: value2
  key3: value3

from btconfig import Config
# Initialize App Config
config = Config(config_file_uri='~/myconfig.yaml').read()
value = config.get('section1.key')
print(value)

The above should return value1

Load a configuration file and retrieve a deeply nested value

Given:

• Config file at /home/myuser/myconfig.yaml
• with contents:
  

section1:
  subsection1:
    item1:
      subitem1: value1
    item2: value2
    item3: value3
  subsection2:
    item1: value1
    item2: value2
    item3: value3
  key1: value1
  key2: value2
  key3: value3
section2:
  item1: value1

from btconfig import Config
# Initialize App Config
config = Config(config_file_uri='~/myconfig.yaml').read()
value = config.get('section1.subsection1.item2')
print(value)

The above should return value2

Load a configuration file and retrieve specified key value using wildcard notation

Given:

• Config file at /home/myuser/myconfig.yaml
• with contents:
  

section1:
  subsection1:
    item1:
      subitem1: value1
    item2: value2
    item3: value3
  subsection2:
    item1: value1
    item2: value2
    item3: value3
  key1: value1
  key2: value2
  key3: value3
section2:
  item1: value1

from btconfig import Config
# Initialize App Config
config = Config(config_file_uri='~/myconfig.yaml').read()
value = config.get('section1.*.item1')
print(value)

The above should return [{'subitem1': 'value1'}, 'value1']

Note: When retrieving values via wildcard, the return value is a list object.

Load a configuration file as a python object

Same as the above examples, just invoke the Config object with as_object=True, as with config = Config('~/myconfig.yaml', as_object=True).read()

In this case, retrieving values from the object can be done via dot-notation, as with: print(config.section1.subsection1.item2), or via get method, as with print(settings.section1.subsection1.item2)

Note: This approach does not support retrieving values via wildcard reference.