Lazily initialize config drivers field

[collindutter]

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Describe your changes

Lazily initializes the config.driver field so that the OpenAiChatPromptDriver doesn't initialize itself when the user doesn't intend to use it.

Issue ticket number and link

NA

[collindutter]

Not sure how to unit test this because of schrodinger's initialization. Inspecting the config.driver property immediately gives it a value.

[vachillo]

unit tests you could inspect config._drivers ?

[collindutter]

Technically there is no _drivers because of the alias. I'll remove the attrs magic since users will never create a _Config directly. It'll always be used via the setters.

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 96.77419% with 1 line in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
griptape/config/config.py	95.45%	1 Missing :warning:

:loudspeaker: Thoughts on this report? Let us know!

[vachillo]

Technically there is no _drivers because of the alias. I'll remove the attrs magic since users will never create a _Config directly. It'll always be used via the setters.

the alias is just for init isnt it? the actual field still exists on the class.

[collindutter]

Ok I really don't know how to test this because of this root conftest which immediately initializes the value for all tests. According to Codecov we're already covered here 🤷‍♂️

[vachillo]

Ok I really don't know how to test this because of this root conftest which immediately initializes the value for all tests. According to Codecov we're already covered here 🤷‍♂️

what about setting it to None at the top of the test file and then importing everything? including setting os.environ["OPENAI_API_KEY"] = None