Rename DataPipe to Op-er (#63325)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/63325
Rename each DataPipe to an operation name ending with er. Functional API should remain `verb` such as `read_from_tar` , `shuffle`, ... (Discussed in [here](https://github.com/facebookexternal/torchdata/pull/97#discussion_r688553905))
- Batch -> Batcher
- Collate -> Collator
- Concat -> Concater
- GroupByKey - > ByKeyGrouper ?
- ListDirFiles -> FileLister
- LoadFilesFromDisk -> FileLoader
- Map -> Mapper
- ReadFilesFromTar -> TarArchiveReader
- ReadFilesFromZip -> ZipArchiveReader
- ReadLinesFromFile -> LineReader
- Shuffle -> Shuffler
- ToBytes -> StreamReader
- Transforms -> Transformer
- Zip -> Zipper
Let me know if you have better name for each DataPipe
Test Plan: Imported from OSS
Reviewed By: mruberry
Differential Revision: D30466950
Pulled By: ejguan
fbshipit-source-id: 72909dca7b3964ab83b965891f96cc1ecf62d049
