wehub-resource-sync
37 lines
1.2 KiB
Python
37 lines
1.2 KiB
Python
from typing import Any, Callable, Dict, Optional
|
|
|
|
import pyarrow
|
|
|
|
from ray.data.block import BlockAccessor
|
|
from ray.data.datasource.file_based_datasource import _resolve_kwargs
|
|
from ray.data.datasource.file_datasink import BlockBasedFileDatasink
|
|
|
|
|
|
class CSVDatasink(BlockBasedFileDatasink):
|
|
def __init__(
|
|
self,
|
|
path: str,
|
|
*,
|
|
arrow_csv_args_fn: Optional[Callable[[], Dict[str, Any]]] = None,
|
|
arrow_csv_args: Optional[Dict[str, Any]] = None,
|
|
file_format="csv",
|
|
**file_datasink_kwargs,
|
|
):
|
|
super().__init__(path, file_format=file_format, **file_datasink_kwargs)
|
|
|
|
if arrow_csv_args_fn is None:
|
|
arrow_csv_args_fn = lambda: {} # noqa: E731
|
|
|
|
if arrow_csv_args is None:
|
|
arrow_csv_args = {}
|
|
|
|
self.arrow_csv_args_fn = arrow_csv_args_fn
|
|
self.arrow_csv_args = arrow_csv_args
|
|
|
|
def write_block_to_file(self, block: BlockAccessor, file: "pyarrow.NativeFile"):
|
|
from pyarrow import csv
|
|
|
|
writer_args = _resolve_kwargs(self.arrow_csv_args_fn, **self.arrow_csv_args)
|
|
write_options = writer_args.pop("write_options", None)
|
|
csv.write_csv(block.to_arrow(), file, write_options, **writer_args)
|