Provide complete range of IO operations

[josevalim]

Each IO operation must have 8 functions: dump, load, from and to as well as the ! version of them. This is an issue to add the missing APIs. We can break it apart per IO type:

• [ ] CSV
• [ ] Parquet
• [ ] Arrow
• [ ] NDJSON

Although I recommend tackling #187 before this one!

[josevalim]

We should probably normalize the Rust APIs well.

[kimjoaoun]

What should dump_parquet and dump_arrow return? I guess that dump_csv should return a CSV parsed as a text file, and the others?

[josevalim]

All of the dump functions should return the contents that we would have found in the file if we used to_format + File.read. So the idea is to skip the writing to disk, and already have the contents in memory.

[kimjoaoun]

Working on this one. This issue is my current priority.

[MarceColl]

Is there any update on this?

[kimjoaoun]

Yes @MarceColl. I'm planning to send the PR that will close this issue later this week.

[MarceColl]

Perfect, thanks @kimjoaoun that's awesome :)

[isaacsanders]

Will this read from S3?