TAPService

class pyvo.dal.TAPService(baseurl, session=None)

Bases: DALService, AvailabilityMixin, CapabilityMixin

a representation of a Table Access Protocol service

instantiate a Table Access Protocol service

Parameters

baseurlstr

the base URL that should be used for forming queries to the service.

sessionobject

optional session to use for network requests

Attributes Summary

examples	returns examples as a list of TAPQuery objects
hardlimit	the hard output limit.
maxrec	the default output limit.
tables	returns tables as a dict-like object
upload_methods	a list of upload methods in form of UploadMethod objects

Methods Summary

create_index(table_name, column_name[, unique])	Creates a table index in the catalog service.
create_query([query, mode, language, ...])	create a query object that constraints can be added to and then executed.
create_table(name, definition[, format])	Creates a table in the catalog service.
describe([width])	Print a summary description of this service.
get_job(job_id)	Returns the job corresponding to an ID.
get_job_list([phases, after, last, ...])	lists jobs that the caller can see in the current security context.
get_tap_capability()	returns the (first) TAP capability of this service.
load_table(name, source[, format])	Loads content to a table
remove_table(name)	Remove a table from the catalog service (Equivalent to drop command in DB).
run_async(query[, language, maxrec, uploads])	runs async query and returns its result
run_sync(query[, language, maxrec, uploads])	runs sync query and returns its result
search(query[, language, maxrec, uploads])	runs sync query and returns its result
submit_job(query[, language, maxrec, uploads])	submit a async query without starting it and returns a AsyncTAPJob object

Attributes Documentation

examples

returns examples as a list of TAPQuery objects

hardlimit

the hard output limit.

Raises

DALServiceError

if the property is not exposed by the service

maxrec

the default output limit.

Raises

DALServiceError

if the property is not exposed by the service

tables

returns tables as a dict-like object

upload_methods

a list of upload methods in form of UploadMethod objects

Methods Documentation

create_index(table_name, column_name, unique=False)

Creates a table index in the catalog service.

Parameters

table_name: str

Name of the table

column_name: str

Name of the column in the table

unique: bool

True for unique index, False otherwise

create_query(query=None, mode='sync', language='ADQL', maxrec=None, uploads=None, **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

baseurlstr

the base URL for the TAP service

querystr

the query string / parameters

modestr

the query mode (sync | async). default “sync”

languagestr

specifies the query language, default ADQL. useful for services which allow to use the backend query language.

maxrecint

specifies the maximum records to return. defaults to the service default.

uploadsdict

a mapping from table names to objects containing a votable.

create_table(name, definition, format='VOSITable')

Creates a table in the catalog service.

Parameters

name: str

Name of the table in the TAP service

definition: stream (object with a read method)

Definition of the table

format: str

Format of the table definition (VOSITable or VOTable).

describe(width=None)

Print a summary description of this service.

This includes the interface capabilities, and the content description if it doesn’t contains multiple data collections (in other words, it is not a TAP service).

get_job(job_id)

Returns the job corresponding to an ID. Note that the caller must be able to see the job in the current security context.

Parameters

job_idstr

ID of the job to view

Returns

JobSummary corresponding to the job ID

get_job_list(phases=None, after=None, last=None, short_description=True)

lists jobs that the caller can see in the current security context. The list can be filtered on the server side by the phases of the jobs, creation date time or Note that by default jobs in ‘ARCHIVED’ phase are not returned.

Parameters

phases: list of str

Union of job phases to filter the results by.

after: datetime

Return only jobs created after this datetime

last: int

Return only the most recent number of jobs

short_description: flag - True or False

If True, the jobs in the list will contain only the information corresponding to the TAP ShortJobDescription object (job ID, phase, run ID, owner ID and creation ID) whereas if False, a separate GET call to each job is performed for the complete job description.

Returns

list of JobSummary

get_tap_capability()

returns the (first) TAP capability of this service.

Returns

A TableAccess instance.

load_table(name, source, format='tsv')

Loads content to a table

Parameters

name: str

Name of the table

source: stream with a read method

Stream containing the data to be loaded

format: str

Format of the data source: tab-separated values(tsv), comma-separated values (csv) or FITS table (FITSTable)

remove_table(name)

Remove a table from the catalog service (Equivalent to drop command in DB).

Parameters

name: str

Name of the table in the TAP service

run_async(query, language='ADQL', maxrec=None, uploads=None, **keywords)

runs async query and returns its result

Parameters

querystr, dict

the query string / parameters

languagestr

specifies the query language, default ADQL. useful for services which allow to use the backend query language.

maxrecint

the maximum records to return. defaults to the service default

uploadsdict

a mapping from table names to objects containing a votable

Returns

TAPResult

the query instance

Raises

DALServiceError

for errors connecting to or communicating with the service

DALQueryError

for errors either in the input query syntax or other user errors detected by the service

DALFormatError

for errors parsing the VOTable response

See also

AsyncTAPJob

run_sync(query, language='ADQL', maxrec=None, uploads=None, **keywords)

runs sync query and returns its result

Parameters

querystr

The query

languagestr

specifies the query language, default ADQL. useful for services which allow to use the backend query language.

maxrecint

the maximum records to return. defaults to the service default

uploadsdict

a mapping from table names to objects containing a votable

Returns

TAPResults

the query result

See also

TAPResults

search(query, language='ADQL', maxrec=None, uploads=None, **keywords)

runs sync query and returns its result

Parameters

querystr

The query

languagestr

specifies the query language, default ADQL. useful for services which allow to use the backend query language.

maxrecint

the maximum records to return. defaults to the service default

uploadsdict

a mapping from table names to objects containing a votable

Returns

TAPResults

the query result

See also

TAPResults

submit_job(query, language='ADQL', maxrec=None, uploads=None, **keywords)

submit a async query without starting it and returns a AsyncTAPJob object

Parameters

querystr

the query string / parameters

languagestr

specifies the query language, default ADQL. useful for services which allow to use the backend query language.

maxrecint

the maximum records to return. defaults to the service default

uploadsdict

a mapping from table names to objects containing a votable

Returns

AsyncTAPJob

the query instance

See also

AsyncTAPJob