Schema¶

class lsst.afw.table.Schema¶

Bases: pybind11_object

Attributes Summary

`EQUAL_ALIASES`
`EQUAL_DOCS`
`EQUAL_FIELDS`
`EQUAL_KEYS`
`EQUAL_NAMES`
`EQUAL_UNITS`
`IDENTICAL`
`VERSION`

Methods Summary

`addField`(field[, type, doc, units, size, ...])	Add a field to the Schema.
`checkUnits`([parse_strict])	Check that all units in the Schema are valid Astropy unit strings.
`compare`(self, other[, flags])
`contains`(self, other[, flags])
`disconnectAliases`(self)
`extract`(patterns, *kwargs)	Extract a dictionary of {<name>: <schema-item>} in which the field names match the given shell-style glob pattern(s).
`find`(self, arg0)
`forEach`(self, arg0)
`getAliasMap`(self)
`getFieldCount`(self)
`getFlagFieldCount`(self)
`getNames`(self[, topOnly])
`getNonFlagFieldCount`(self)
`getOrderedNames`()	Return a list of field names in the order the fields were added to the Schema.
`getRecordSize`(self)
`join`(args, *kwargs)	Overloaded function.
`readFits`(args, *kwargs)	Overloaded function.
`setAliasMap`(self, aliases)

Attributes Documentation

EQUAL_ALIASES = 16¶

EQUAL_DOCS = 4¶

EQUAL_FIELDS = 15¶

EQUAL_KEYS = 1¶

EQUAL_NAMES = 2¶

EQUAL_UNITS = 8¶

IDENTICAL = 31¶

VERSION = 3¶

Methods Documentation

addField(field, type=None, doc='', units='', size=None, doReplace=False, parse_strict='raise')¶

Add a field to the Schema.

Parameters:

fieldstr or Field: The string name of the Field, or a fully-constructed Field object. If the latter, all other arguments besides doReplace are ignored.
typestr, optional: The type of field to create. Valid types are the keys of the afw.table.Field dictionary.
docstr: Documentation for the field.
unitsstr: Units for the field, or an empty string if unitless.
sizeint: Size of the field; valid for string and array fields only.
doReplacebool: If a field with this name already exists, replace it instead of raising pex.exceptions.InvalidParameterError.
parse_strictstr: One of ‘raise’ (default), ‘warn’, or ‘strict’, indicating how to handle unrecognized unit strings. See also astropy.units.Unit.

Returns:

result: Result of the Field addition.

checkUnits(parse_strict='raise')¶

Check that all units in the Schema are valid Astropy unit strings.

Parameters:

parse_strictstr, optional: One of ‘raise’ (default), ‘warn’, or ‘strict’, indicating how to handle unrecognized unit strings. See also astropy.units.Unit.

compare(self: lsst.afw.table.Schema, other: lsst.afw.table.Schema, flags: int = 1) → int¶

contains(self: lsst.afw.table.Schema, other: lsst.afw.table.Schema, flags: int = 1) → int¶

disconnectAliases(self: lsst.afw.table.Schema) → None¶

extract(*patterns, **kwargs)¶

Extract a dictionary of {<name>: <schema-item>} in which the field names match the given shell-style glob pattern(s).

Any number of glob patterns may be passed; the result will be the union of all the result of each glob considered separately.

Parameters:

patternsArray of str

List of glob patterns to use to select field names.

kwargsdict

Dictionary of additional keyword arguments. May contain:

regexstr or re pattern: A regular expression to be used in addition to any glob patterns passed as positional arguments. Note that this will be compared with re.match, not re.search.
substr: A replacement string (see re.MatchObject.expand) used to set the dictionary keys of any fields matched by regex.
orderedbool, optional: If True, a collections.OrderedDict will be returned instead of a standard dict, with the order corresponding to the definition order of the Schema. Default is False.

Returns:

ddict: Dictionary of extracted name-schema item sets.

Raises:

ValueError

Raised if the sub keyword argument is invalid without the regex argument.

Also raised if an unknown keyword argument is supplied.

find(self: object, arg0: object) → object¶

forEach(self: lsst.afw.table.Schema, arg0: object) → None¶

getAliasMap(self: lsst.afw.table.Schema) → lsst.afw.table.AliasMap¶

getFieldCount(self: lsst.afw.table.Schema) → int¶

getFlagFieldCount(self: lsst.afw.table.Schema) → int¶

getNames(self: lsst.afw.table.Schema, topOnly: bool = False) → set[str]¶

getNonFlagFieldCount(self: lsst.afw.table.Schema) → int¶

getOrderedNames()¶

Return a list of field names in the order the fields were added to the Schema.

Returns:

namesList: Field names in order they were added to the Schema.

getRecordSize(self: lsst.afw.table.Schema) → int¶

join(*args, **kwargs)¶

Overloaded function.

join(self: lsst.afw.table.Schema, a: str, b: str) -> str
join(self: lsst.afw.table.Schema, a: str, b: str, c: str) -> str
join(self: lsst.afw.table.Schema, a: str, b: str, c: str, d: str) -> str

static readFits(*args, **kwargs)¶

Overloaded function.

readFits(filename: str, hdu: int = -2147483648) -> lsst.afw.table.Schema
readFits(manager: lsst.afw.fits._fits.MemFileManager, hdu: int = -2147483648) -> lsst.afw.table.Schema

setAliasMap(self: lsst.afw.table.Schema, aliases: lsst.afw.table.AliasMap) → None¶

Navigation

Schema¶