Data discovery (gwpy.io.datafind)

Utilities for auto-discovery of GW data files.

Automatic discovery of file paths for both LIGO and Virgo index solutions (gwdatafind or ffl, respectvely) is supported.

The functions in this module are highly reliant on having local access to files (either directly, or via NFS/fuse).

Data discovery using the DataFind service requires the gwdatafind Python package (a dependency of gwpy), and either the GW_DATAFIND_SERVER (or legacy LIGO_DATAFIND_SERVER) environment variable to be set, or the host keyword must be passed to find_urls() and friends.

Data discovery using the Virgo FFL system requires the FFLPATH environment variable to point to the directory containing FFL files, or the VIRGODATA environment variable to point to a directory containing an ffl subdirectory, which contains FFL files.

Functions

find_best_frametype(-> str)	Intelligently select the best frametype from which to read this channel.
find_frametype(...)	Find the frametype(s) that hold data for a given channel.
find_latest(observatory, frametype[, ...])	Find the path of the latest file of a given data type.
find_types(observatory[, match, trend])	Find the available data types for a given observatory.
find_urls(observatory, frametype, start, end)	Find the URLs of files of a given data type in a GPS interval.
on_tape(*files)	Determine whether any of the given files are on tape.