Class ReadRowsPage (2.19.0)

ReadRowsPage(stream_parser, message)

An iterator of rows from a read session message.

Parameters

Name	Description
`stream_parser`	`google.cloud.bigquery_storage_v1.reader._StreamParser` A helper for parsing messages into rows.
`message`	`google.cloud.bigquery_storage_v1.types.ReadRowsResponse` A message of data from a read rows stream.

int: Total items in the page.

int: Remaining items in the page.

__iter__()

A ReadRowsPage is an iterator.

__next__()

Get the next row in the page.

next()

Get the next row in the page.

to_arrow()

Create an pyarrow.RecordBatch of rows in the page.

Returns

Type	Description
`pyarrow.RecordBatch`	Rows from the message, as an Arrow record batch.

to_dataframe(dtypes=None)

Create a pandas.DataFrame of rows in the page.

This method requires the pandas libary to create a data frame and the fastavro library to parse row messages.

Parameter

Name	Description
`dtypes`	`Map[str, Union[str, pandas.Series.dtype]]` Optional. A dictionary of column names pandas `dtype`s. The provided `dtype` is used when constructing the series for the column specified. Otherwise, the default pandas behavior is used.

Returns

Type	Description
`pandas.DataFrame`	A data frame of all rows in the stream.