- class pyvo.dal.SIA2Results(votable, url=None, session=None)[source]¶
The list of matching images resulting from an image (SIA2) query. Each record contains a set of metadata that describes an available image matching the query constraints. The number of records in the results is available by passing it to the Python built-in
This class supports iterable semantics; thus, individual records (in the form of
ObsCoreRecordinstances) are typically accessed by iterating over an
Alternatively, records can be accessed randomly via
getrecord()or through a Python Database API (v2) Cursor (via
cursor()). Column-based data access is possible via the
SIA2Resultsis essentially a wrapper around an Astropy
Tableinstance where the columns contain the various metadata describing the images. One can access that VOTable directly via the
votableattribute. Thus, when one retrieves a whole column via
getcolumn(), the result is a Numpy array. Alternatively, one can manipulate the results as an Astropy
Tablevia the following conversion:
table = results.votable.to_table()
SIA2Resultssupports the array item operator
[...]in a read-only context. When the argument is numerical, the result is an
ObsCoreRecordinstance, representing the record at the position given by the numerical index. If the argument is a string, it is interpreted as the name of a column, and the data from the column matching that name is returned as a Numpy array.
initialize the cursor. This constructor is not typically called by directly applications; rather an instance is obtained from calling a DALQuery’s execute().
the service response parsed into an astropy.io.votable.tree.VOTableFile instance.
the URL that produced the response
optional session to use for network requests
if the response VOTable does not contain a response table
return a representation of a SIA2 result record that follows dictionary semantics.
return a representation of a SIA2 result record that follows dictionary semantics. The keys of the dictionary are those returned by this instance’s fieldnames attribute. The returned record has additional image-specific properties
the integer index of the desired record where 0 returns the first record
a dictionary-like wrapper containing the result record metadata.
if index is negative or equal or larger than the number of rows in the result table.