TableReader

class ctapipe.io.tableio.TableReader(**kwargs: Any)

Bases: ctapipe.core.component.Component

Base class for row-wise table readers. Generally methods that read a full table at once are preferred to this method, since they are faster, but this can be used to re-play a table row by row into a ctapipe.core.Container class (the opposite of TableWriter)

Methods Summary

add_column_transform(table_name, col_name, …)	Add a transformation function for a column.
close()
open(filename, **kwargs)
read(table_name, containers, prefixes, **kwargs)	Returns a generator that reads the next row from the table into the given container.

Methods Documentation

add_column_transform(table_name, col_name, transform)

Add a transformation function for a column. This function will be called on the value in the container before it is written to the output file.

Parameters

table_name: str

identifier of table being written

col_name: str

name of column in the table (or item in the Container)

transform: callable

function that take a value and returns a new one

abstract close()

abstract open(filename, **kwargs)

abstract read(table_name, containers, prefixes, **kwargs)

Returns a generator that reads the next row from the table into the given container. The generator returns the same container. Note that no containers are copied, the data are overwritten inside.

Parameters

table_name: str

name of table to read from

containers: ctapipe.core.Container or iterable thereof

Container instance(s) to fill

prefixes: bool, str or iterable of str

prefixes used during writing of the table