Adds ability to use variables with the driver.execute function #86

[skrawcz]

This implements #86 and enables one to pass driver.Variable objects as expected outputs to the driver.execute(). This reduces the boiler plate for someone to massage getting variables for use with .execute().

Adds to unit test.

Changes

• adds to driver code for creating the final variables

How I tested this

• unit test

Notes

• Closes Driver should take in variables to execute as well as functions/node names #86

Checklist

• PR has an informative and human-readable title (this will be pulled into the release notes)
• Changes are limited to a single goal (no scope creep)
• Code passed the pre-commit check & code is left cleaner/nicer than when first encountered.
• Any change in functionality is tested
• New functions are documented (with a description, list of inputs, and expected output)
• Placeholder code is flagged / future TODOs are captured in comments
• Project documentation has been updated if adding/changing functionality.

[elijahbenizzy]

🚢 🇮🇹