Interactive prompt for variables that should be set at runtime
Varlet lets you prompt for variables at runtime, and saves them to a variables module.
pip install varlet
In your settings.py file add:
`python from varlet import variable `
whenever you declare a variable that could change depending on the environment, use:
`python # It is OK to make this True if you are in dev DEBUG = variable("DEBUG", default=False) `
If this “DEBUG” variable is not defined in the variables module (somewhere in your python path), the user is prompted to enter a Python expression to set it.
When the prompt is displayed, the comments directly above the call to variable() are displayed, and the prompt has a default value as specified by the default argument.
## Implementation Details
varlet assumes there is a variables module located somewhere in your Python path. If it is not found, it will attempt to create one based on the location of __main__.
When a variable is set to a value, varlet will eval the value (to make sure it is valid python), and then perform ast.literal_eval(repr(value)) to ensure that the value has a valid representation that can be written to a file. The repr(value) is then appended to the end of the variables module (along with any comments associated with the value).
If STDIN is not a tty-like interface, then a KeyError is raise if the variable is not set in the variables module.