python - Pyarrow 从 s3 读/写

Question

是否可以在 s3 中将 Parquet 文件从一个文件夹读取和写入另一个文件夹，而无需使用 pyarrow.

这是我的代码:

import pyarrow.parquet as pq
import pyarrow as pa
import s3fs

s3 = s3fs.S3FileSystem()

bucket = 'demo-s3'

pd = pq.ParquetDataset('s3://{0}/old'.format(bucket), filesystem=s3).read(nthreads=4).to_pandas()
table = pa.Table.from_pandas(pd)
pq.write_to_dataset(table, 's3://{0}/new'.format(bucket), filesystem=s3, use_dictionary=True, compression='snappy')

Answer 1

如果您不想直接复制文件，看来您确实可以避免使用 Pandas :

table = pq.ParquetDataset('s3://{0}/old'.format(bucket),
    filesystem=s3).read(nthreads=4)
pq.write_to_dataset(table, 's3://{0}/new'.format(bucket), 
    filesystem=s3, use_dictionary=True, compression='snappy')