Key completion for dataset access

[ElenaKhaustova]

Description

Solves #3914

Development notes

• Implemented IPython and Jupyter key completions for accessing datasets in the catalog. The solution is based on defining _ipython_key_completions_() for _FrozenDatasets class.

• Original names (with non-word characters) are suggested as keys but those that are replaced with __ (as for properties) are accepted as well.

• Manually tested with transcoded datasets and configuration patterns.

Developer Certificate of Origin

We need all contributions to comply with the Developer Certificate of Origin (DCO). All commits must be signed off by including a Signed-off-by line in the commit message. See our wiki for guidance.

If your PR is blocked due to unsigned commits, then you must follow the instructions under "Rebase the branch" on the GitHub Checks page for your PR. This will retroactively add the sign-off to all unsigned commits and allow the DCO check to pass.

Checklist

• Read the contributing guidelines
• Signed off each commit with a Developer Certificate of Origin (DCO)
• Opened this PR as a 'Draft Pull Request' if it is work-in-progress
• Updated the documentation to reflect the code changes
• Added a description of this change in the RELEASE.md file
• Added tests to cover my changes
• Checked if this change will affect Kedro-Viz, and if so, communicated that with the Viz team

[noklam]

Generally looks good, I have some questions:

1. When I try to prompt the autocompletion, it seems to prompt me to use the single quote instead of the more common " in Python. Is this something we can control or it's how IPython completion works? If I type catalog.datasets["] and hit tab then it would finish the autocompletion without the finishing ", which means a few more keystrokes. This is not a deal breaker but just want to check if we can make this experience smoother.

[ElenaKhaustova]

@datajoely, regarding your question about placing parameters at the bottom - sorting is applied internally in ipython completer.py after _ipython_key_completions_() is called, so I cannot force a custom order. Keys are always in lexicographic order.

[datajoely]

Sounds good! @ElenaKhaustova , I petition that we drop the parameters god object in 1.0.0 - cc @astrojuanlu

[ElenaKhaustova]

Generally looks good, I have some questions:

1. When I try to prompt the autocompletion, it seems to prompt me to use the single quote instead of the more common " in Python. Is this something we can control or it's how IPython completion works? If I type catalog.datasets["] and hit tab then it would finish the autocompletion without the finishing ", which means a few more keystrokes. This is not a deal breaker but just want to check if we can make this experience smoother.

Yes, that's the way IPython completion works and there's no any API to customise it from the outside. I see some logic for matching the closing quote but it's not straightforward why it's not working. So there's not much that we can do but create an issue and ask.

[noklam]

Thanks for checking, I think this is good enough.

[astrojuanlu]

Left a comment at #3893 (comment) and marking the off-topic comments as such.

[astrojuanlu]

Works like a charm! ✨