Default for keys in dictionary

[esseti]

With dict we can set defaults

MYVAR = env.dict(
    "MYVAR",
    {
        'value': bool,
        'cast': {
            'ACTIVE': bool,
            'URL': str,
        }
    },
    default={
        'ACTIVE': False,
        'URL': "http://example.com",
    })

now, the default are used IFF the entry MYVAR is not present in the .env file.
if i've an entry of this type MYVAR=ACTIVE:True; the result is a dictionary that is {"ACTIVE":"True"}

wouldn't be better to apply the default for all the keys that are not specified in the env? thus, in my example i would get
{"ACTIVE":"True", "URL": "http://example.com"}

[pataquets]

Not sure about the complexity, looks like a nice addition, as I'm tinkering with improving logging configuration (ie. via env vars) for a handful of legacy apps. Still figuring out what/how to merge from logging's dictConfig().