Database (sunpy.database)

sunpy.database can be used to provide a local cache of the files and records retrieved from various remote services. For an introduction to the database see Using the database package.

sunpy.database Package

Functions

disable_undo(database)	A context manager to disable saving the used commands in the undo history.
split_database(source_database, ...)	Queries the source database with the query string, and moves the matched entries to the destination database.

Classes

Database(url[, CacheClass[, cache_size[, ...)	Parameters: url (str) -- A URL describing the database. This value is simply passed to
EntryAlreadyAddedError(database_entry)	This exception is raised if a database entry is attempted to be added to the database although it was already saved in it.
NoSuchEntryError(database_entry)	This exception is raised if it is attempted to remove an entry even though it does not exist in the database.
NoSuchTagError(tag_name)	This exception is raised if a tag cannot be found in a database by its name.
NonRemovableTagError(database_entry, tag)	This exception is raised if it is attempted to remove a tag from a database entry even though it is not saved in this entry.
EntryAlreadyStarredError(database_entry)	This exception is raised if a database entry is marked as starred using Database.star() although it was already starred before this operation.
EntryAlreadyUnstarredError(database_entry)	This exception is raised if the star mark from a database entry is attempted to be removed although the entry is not starred.
EntryNotFoundError(entry_id)	This exception is raised if a database entry cannot be found by its unique ID.
TagAlreadyAssignedError(database_entry, tag_name)	This exception is raised if it is attempted to assign a tag to a database entry but the database entry already has this tag assigned.
PartialFetchError(paths, n_expected)	This exception is raised if the number of files returned by the downloader does not match the number expected.

Submodules

sunpy.database.tables Module

Functions

entries_from_query_result(qr[, default_waveunit])	Use a query response returned from sunpy.net.vso.VSOClient.search() to generate instances of DatabaseEntry.
entries_from_file(file[, default_waveunit, ...])	Use the headers of a FITS file to generate an iterator of sunpy.database.tables.DatabaseEntry instances.
entries_from_dir(fitsdir[, recursive, ...])	Search the given directory for FITS files and use the corresponding FITS headers to generate instances of DatabaseEntry.
display_entries(database_entries[, columns, ...])	Print a table to display the database entries.

Classes

WaveunitNotFoundError(obj)	This exception is raised if a wavelength unit cannot be found in a FITS header or in a VSO query result block.
WaveunitNotConvertibleError(waveunit)	This exception is raised if a wavelength cannot be converted to an astropy.units.Unit instance.
JSONDump(dump)
FitsHeaderEntry(key, value)
FitsKeyComment(key, value)
Tag(name)
DatabaseEntry(**kwargs)	This represents the main table of the database and each instance represents one record that can be saved in the database.

sunpy.database.caching Module

Classes

BaseCache([maxsize])	BaseCache is a class that saves and operates on an OrderedDict.
LRUCache([maxsize])
LFUCache([maxsize])

sunpy.database.commands Module

Classes

EmptyCommandStackError	This exception is raised if it is attempted to pop from a command stack even though it is empty.
NoSuchEntryError(database_entry)	This exception is raised if it is attempted to remove an entry even though it does not exist in the database.
NonRemovableTagError(database_entry, tag)	This exception is raised if it is attempted to remove a tag from a database entry even though it is not saved in this entry.
DatabaseOperation()	This is the abstract main class for all database operations.
AddEntry(session, database_entry)	Add a new database entry to this session.
RemoveEntry(session, entry)	Remove the given database entry from the session.
EditEntry(database_entry, **kwargs)	Change the properties of the database entry.
CommandManager()	The CommandManager saves all executed and reverted commands to act as an undo-redo-manager.

sunpy.database.attrs Module

Classes

Starred()
Tag(tagname)
Path(value[, inverted])
DownloadTime(start, end)
FitsHeaderEntry(key, value[, inverted])