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LSST Data Management Base Package
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lsst.afw.table._schema Namespace Reference

Classes

class  Field
 
class  Key
 
class  Schema
 
class  SchemaItem
 

Functions

 _registerInstantiations (abc, types)
 
 makeSchemaFromFields (fields)
 

Variables

dict _dtypes
 

Function Documentation

◆ _registerInstantiations()

lsst.afw.table._schema._registerInstantiations ( abc,
types )
protected
Iterate over a private dict (filled by template instantiations in C++)
to register template instantiations a TemplateMeta ABCs.

If an entry for the type string exists in _dtypes, we use that instead of
the string as the key, and use the string as an alias.

Definition at line 61 of file _schema.py.

61def _registerInstantiations(abc, types):
62 """Iterate over a private dict (filled by template instantiations in C++)
63 to register template instantiations a TemplateMeta ABCs.
64
65 If an entry for the type string exists in _dtypes, we use that instead of
66 the string as the key, and use the string as an alias.
67 """
68 for k, v in types.items():
69 dtype = _dtypes.get(k, None)
70 if dtype is not None:
71 abc.register(dtype, v)
72 abc.alias(k, v)
73 else:
74 abc.register(k, v)
75
76
77# _Key, _Field, and _SchemaItem are {str: class} dicts populated by the C++
78# wrappers. The keys are a superset of those in _dtypes.

◆ makeSchemaFromFields()

lsst.afw.table._schema.makeSchemaFromFields ( fields)
Create a Schema from a sequence of Fields. For pickle support.

Parameters
----------
fields : `tuple` ['lsst.afw.table.Field']
    The fields to construct the new Schema from.

Returns
-------
schema : `lsst.afw.table.Schema`
    The constructed Schema.

Definition at line 246 of file _schema.py.

246def makeSchemaFromFields(fields):
247 """Create a Schema from a sequence of Fields. For pickle support.
248
249 Parameters
250 ----------
251 fields : `tuple` ['lsst.afw.table.Field']
252 The fields to construct the new Schema from.
253
254 Returns
255 -------
256 schema : `lsst.afw.table.Schema`
257 The constructed Schema.
258 """
259 schema = Schema()
260 for field in fields:
261 schema.addField(field)
262 return schema

Variable Documentation

◆ _dtypes

dict lsst.afw.table._schema._dtypes
protected
Initial value:
1= {
2 "String": str,
3 "B": np.uint8,
4 "U": np.uint16,
5 "I": np.int32,
6 "L": np.int64,
7 "F": np.float32,
8 "D": np.float64,
9 "Angle": lsst.geom.Angle,
10}
A class representing an angle.
Definition Angle.h:128

Definition at line 37 of file _schema.py.