SLAService

class pyvo.dal.SLAService(baseurl, *, capability_description=None, session=None)

Bases: DALService

a representation of an spectral line catalog (SLA) service

instantiate an SLA service

Parameters:

baseurlstr

the base URL for submitting search queries to the service.

sessionobject

optional session to use for network requests

Attributes Summary

columns	the available columns on this service
description	the service description.

Methods Summary

create_query([wavelength, request])	create a query object that constraints can be added to and then executed.
describe()	describe the general information about the DAL service
search(wavelength, **keywords)	submit a simple SLA query to this service with the given constraints.

Attributes Documentation

columns

the available columns on this service

description

the service description.

If this is not provided during instantiation, this method will download a sample from the service and read the description in the sample’s metadata instead.

Methods Documentation

create_query(wavelength=None, *, request='queryData', **keywords)

create a query object that constraints can be added to and then executed. The input arguments will initialize the query with the given values.

Parameters:

wavelengthQuantity class or sequence of two floats

the bandwidth range the observations belong to. assuming meters if unit is not specified.

**keywords

additional parameters can be given via arbitrary case insensitive keyword arguments. Where there is overlap with the parameters set by the other arguments to this function, these keywords will override.

Returns:

SLAQuery

the query instance

See also

SLAQuery

describe()

describe the general information about the DAL service

search(wavelength, **keywords)

submit a simple SLA query to this service with the given constraints.

This method is provided for a simple but typical SLA queries. For more complex queries, one should create an SLAQuery object via create_query()

Parameters:

wavelengthQuantity class or sequence of two floats

the bandwidth range the observations belong to. assuming meters if unit is not specified.

**keywords

additional parameters can be given via arbitrary case insensitive keyword arguments. Where there is overlap with the parameters set by the other arguments to this function, these keywords will override.

Returns:

SLAResults

a container holding a table of matching spectral lines

Raises:

DALServiceError

for errors connecting to or communicating with the service

DALQueryError

if the service responds with an error, including a query syntax error.

See also

SLAResults

pyvo.dal.query.DALServiceError

pyvo.dal.query.DALQueryError