Required and optional parameters in template?

Does Confuse support required and optional parameters for template validation?

Something like:

confuse.Template({
    'url': confuse.String(required=True),
    'url2': confuse.OneOf(['a','b', 'c'], required=False)
}),

Expected results should be:

Pass:

url: abc

url: abc
url2: c

Fail:

url2: a

url: 2
url2: b

url: abc
url2: j

Yes! Most templates have a default parameter, which, if set, means that they are optional.

confuse/confuse/templates.py

Line 42 in 6ffb622

def __init__(self, default=REQUIRED):

I tried with:

confuse.Template({
    'url': confuse.String(default=REQUIRED),
    'url2': confuse.OneOf(['a','b', 'c'])
}),

But it did not do the trick, I got no error due to a missing required key (url) :(

Also, is it possible to make an entire section required? Something like:

confuse.Template({
    'urls' confuse.Dict(default=REQUIRED) : {
        'first': confuse.String(),
        'second': confuse.String(),
    }
}),

Aha, you do not want to wrap the entire thing in confuse.Template. Just use the dictionary directly, like this:

>>> data = {'other_key': 'something'}
>>> config = confuse.RootView([confuse.ConfigSource.of(data)])
>>> config.get(confuse.Template({'key': confuse.String()}))  # this is what you were doing
{'other_key': 'something'}
>>> config.get({'key': confuse.String()})  # this is what you should do
Traceback (most recent call last):
[...]
confuse.exceptions.NotFoundError: key not found

Also, that default=REQUIRED is not necessary (things are required by default).

Thank you!