[Core feature] Replace os.path with pathlib for flytekit

[MortalHappiness]

Motivation: Why do you think this is important?

pathlib is a more modern way to do path manipulation since Python 3.4. Currently flytekit mixes usage of os.path and pathlib, which makes the code harder to read.

Goal: What should the final outcome look like, ideally?

Using the correspondance table to replace all os.path with pathlib except for some low level string operations that do not have a counterpart in pathlib. For example, os.path.sep.

Describe alternatives you've considered

Replace all pathlib with os.path. This can also prevent the mixed usage of os.path and pathlib but it is not recommended.

Propose: Link/Inline OR Additional context

No response

Are you sure this issue hasn't been raised already?

• Yes

Have you read the Code of Conduct?

• Yes

[runllm]

To replace os.path with pathlib in Flytekit, follow the correspondence table to ensure a smooth transition. This will modernize the codebase and improve readability.

Would you like more details on specific replacements or examples of how to implement this change?

Sources:

• Core feature
• Hey Flyte
• Sorry for so much spam

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