Knobs (Version 2.0.1 ) are used to tune environment variables¶
>>> pirates = Knob('JOLLY_ROGER_PIRATES', 124, description='Yar')
>>> pirates.get()
124
>>> pirates.get_type()
>>> <type 'int'>
Use knobs if you worship at the church of the 12 Factor App
A knob is a wrapper for an environment variable. It can:
- Read and write an environment variable
- Make sure it is of the expected type
- Validate a value is good.
knobs will search for a nominated environmental file (default .env) and load that
into the environment. A knob is type aware, configured from the environment and its value can be
persisted to ease the creation of configuration files.