anujkumar93/envyaml

Simple YAML configuration file parser

EnvYAML |

Simple YAML configuration file parser with easy access for structured data

Why

Modern configuration file become to be more and more complex, flexible and readable. YAML file format are perfect to store configuration, but had no option to pass environment variables. They give flexibility, readability and provide option to store complex data structure. This project aim to simplify usage of the YAML file and environment variables as program configuration file with easy config key access.

Install

pip install envyaml

Basic usage

Let's assume we had a project with this config file env.yaml

# env.yaml
project:
  name: "${PROJECT_NAME}-${PROJECT_ID}"

database:
    host: $DATABASE_HOST
    port: 3301
    username: username
    password: $DATABASE_PASSWORD
    database: test
    
    table:
      user: table_user
      blog: table_blog

redis:
    host: $REDIS_HOST
    port: 5040
    
    config:
      expire: 300
      prefix: $REDIS_PREFIX

empty_env: $NOT_EXIST_ENV_VARIABLE

and environment variables set to

PROJECT_NAME=simple-hello
PROJECT_ID=42
DATABASE_HOST=xxx.xxx.xxx.xxx
DATABASE_PASSWORD=super-secret-password
REDIS_PREFIX=state

parse file with EnvYAML

from envyaml import EnvYAML

# read file env.yaml and parse config
env = EnvYAML('env.yaml')

# access project name
print(env['project.name'])

# >> simple-hello-42

# access whole database section
print(env['database'])

# {
# 'database': 'test',
# 'host': 'xxx.xxx.xxx.xxx',
# 'password': 'super-secret-password',
# 'port': 3301,
# 'table':
#   {
#       'blog': 'table_blog', 
#       'user': 'table_user'
#   },
# 'username': 'username'
# }

# access database host value as key item
print(env['database.host'])

# >> xxx.xxx.xxx.xxx

# access database user table value as key item
print(env['database.table.user'])

# >> table_user

# access list items by number
print(env['list_test'][0])

# >> one

# access list items by number as key 
print(env['list_test.1'])

# >> two

access config with get function and default value

print(env.get('not.exist.value', 'default'))
# >> default

print(env.get('empty_env', 'default'))
# >> default

print(env['empty_env'])
# >> None

License

MIT licensed. See the LICENSE file for more details.