update torch.where to throw error for single input

[k223kim]

Before submitting

• Was this discussed/approved via a Github issue? (no need for typos and docs improvements)
• Did you read the contributor guideline, Pull Request section?
• Did you make sure to update the docs?
• Did you write any new necessary tests?

What does this PR do?

Fixes #146. It throws a more descriptive error saying that Thunder is yet to support single input (condition only) torch.where.

PR review

Anyone in the community is free to review the PR once the tests have passed.

Did you have fun?

Loving every bit of this! 🚀

[mruberry]

Looks really good except for one small nit about the type annotations on where -- I made a comment for you review

[k223kim]

Hey @mruberry! Thanks for the review :) Just updated my code based on your comments! Can't wait to see my first PR getting merged 🚀

[mruberry]

Cool! Thanks @k223kim!

[k223kim]

Just one more question @mruberry! It says "required statuses must pass before merging". Is there anything else I should be working on to merge this PR? It's my first PR so I am not really familiar with this process. ;)

[mruberry]

Just one more question @mruberry! It says "required statuses must pass before merging". Is there anything else I should be working on to merge this PR? It's my first PR so I am not really familiar with this process. ;)

Nope, nothing else you need to do, @k223kim. Sorry for the confusion.

@t-vi @Borda we should probably think about clarifying the merge process somewhere

[t-vi]

Thank you @k223kim @mruberry .

@mruberry Yes, maybe you can add a little paragraph to @nikitaved (great) contributing section https://lightning-thunder.readthedocs.io/en/latest/advanced/contrib_thunder.html Thank you.

[mruberry]

Thank you @k223kim @mruberry .

@mruberry Yes, maybe you can add a little paragraph to @nikitaved (great) contributing section lightning-thunder.readthedocs.io/en/latest/advanced/contrib_thunder.html Thank you.

Not sure I'd know what to write.

[k223kim]

@mruberry
Maybe add a small section called When it is ready for my PR to be merged? and add something along the lines of 'All tests are passing, at least one approval'? (something like the following)

When it is ready for my PR to be merged?

• Is your code passing all tests?
• Did you get at least one approval?

If so, your PR is ready to be merged! 🚀

[mruberry]

@mruberry Maybe add a small section called When it is ready for my PR to be merged? and add something along the lines of 'All tests are passing, at least one approval'? (something like the following)

When it is ready for my PR to be merged?

• Is your code passing all tests?
• Did you get at least one approval?

If so, your PR is ready to be merged! 🚀

That sounds like a great start, @k223kim!