pyarrow.flight.MetadataRecordBatchReader

class pyarrow.flight.MetadataRecordBatchReader

Bases: _MetadataRecordBatchReader

The base class for readers for Flight streams.

See also

FlightStreamReader

__init__(*args, **kwargs)

Methods

__init__(*args, **kwargs)
read_all(self)	Read the entire contents of the stream as a Table.
read_chunk(self)	Read the next RecordBatch along with any metadata.
read_pandas(self, **options)	Read contents of stream to a pandas.DataFrame.
to_reader(self)	Convert this reader into a regular RecordBatchReader.

Attributes

schema

Get the schema for this reader.

read_all(self)

Read the entire contents of the stream as a Table.

read_chunk(self)

Read the next RecordBatch along with any metadata.

Returns:

dataRecordBatch

The next RecordBatch in the stream.

app_metadataBuffer or None

Application-specific metadata for the batch as defined by Flight.

Raises:

StopIteration

when the stream is finished

read_pandas(self, **options)

Read contents of stream to a pandas.DataFrame.

Read all record batches as a pyarrow.Table then convert it to a pandas.DataFrame using Table.to_pandas.

Parameters:

**options

Arguments to forward to Table.to_pandas().

Returns:

dfpandas.DataFrame

schema

Get the schema for this reader.

to_reader(self)

Convert this reader into a regular RecordBatchReader.

This may fail if the schema cannot be read from the remote end.

Returns:

RecordBatchReader

previous

pyarrow.flight.Location

next

pyarrow.flight.MetadataRecordBatchWriter