def _initMapper(self, repoData):
'''Initialize and keep the mapper in a member var.
Parameters
----------
repoData : RepoData
The RepoData with the properties of this Repository.
'''
# rule: If mapper is:
# - an object: use it as the mapper.
# - a string: import it and instantiate it with mapperArgs
# - a class object: instantiate it with mapperArgs
mapper = repoData.cfg.mapper
# if mapper is a string, import it:
if isinstance(mapper, basestring):
mapper = doImport(mapper)
# now if mapper is a class type (not instance), instantiate it:
if inspect.isclass(mapper):
mapperArgs = copy.copy(repoData.cfg.mapperArgs)
if mapperArgs is None:
mapperArgs = {}
if 'root' not in mapperArgs:
mapperArgs['root'] = repoData.cfg.root
mapper = mapper(parentRegistry=repoData.parentRegistry,
repositoryCfg=repoData.cfg,
**mapperArgs)
self._mapper = mapper
def _initMapper(self, repoData):
'''Initialize and keep the mapper in a member var.
Parameters
----------
repoData : RepoData
The RepoData with the properties of this Repository.
'''
# rule: If mapper is:
# - an object: use it as the mapper.
# - a string: import it and instantiate it with mapperArgs
# - a class object: instantiate it with mapperArgs
mapper = repoData.cfg.mapper
# if mapper is a string, import it:
if isinstance(mapper, basestring):
mapper = doImport(mapper)
# now if mapper is a class type (not instance), instantiate it:
if inspect.isclass(mapper):
mapperArgs = copy.copy(repoData.cfg.mapperArgs)
if mapperArgs is None:
mapperArgs = {}
if 'root' not in mapperArgs:
mapperArgs['root'] = repoData.cfg.root
mapper = mapper(parentRegistry=repoData.parentRegistry,
repositoryCfg=repoData.cfg,
**mapperArgs)
self._mapper = mapper
def init_fromDict(initDict, basePath='lsst.pipe.tasks.functors', typeKey='functor'):
"""Initialize an object defined in a dictionary
The object needs to be importable as
'{0}.{1}'.format(basePath, initDict[typeKey])
The positional and keyword arguments (if any) are contained in
"args" and "kwargs" entries in the dictionary, respectively.
This is used in `functors.CompositeFunctor.from_yaml` to initialize
a composite functor from a specification in a YAML file.
Parameters
----------
initDict : dictionary
Dictionary describing object's initialization. Must contain
an entry keyed by ``typeKey`` that is the name of the object,
relative to ``basePath``.
basePath : str
Path relative to module in which ``initDict[typeKey]`` is defined.
typeKey : str
Key of ``initDict`` that is the name of the object
(relative to `basePath`).
"""
initDict = initDict.copy()
# TO DO: DM-21956 We should be able to define functors outside this module
pythonType = doImport('{0}.{1}'.format(basePath, initDict.pop(typeKey)))
args = []
if 'args' in initDict:
args = initDict.pop('args')
if isinstance(args, str):
args = [args]
return pythonType(*args, **initDict)
def init_fromDict(initDict,
basePath='lsst.pipe.tasks.functors',
typeKey='functor',
name=None):
"""Initialize an object defined in a dictionary
The object needs to be importable as
f'{basePath}.{initDict[typeKey]}'
The positional and keyword arguments (if any) are contained in
"args" and "kwargs" entries in the dictionary, respectively.
This is used in `functors.CompositeFunctor.from_yaml` to initialize
a composite functor from a specification in a YAML file.
Parameters
----------
initDict : dictionary
Dictionary describing object's initialization. Must contain
an entry keyed by ``typeKey`` that is the name of the object,
relative to ``basePath``.
basePath : str
Path relative to module in which ``initDict[typeKey]`` is defined.
typeKey : str
Key of ``initDict`` that is the name of the object
(relative to `basePath`).
"""
initDict = initDict.copy()
# TO DO: DM-21956 We should be able to define functors outside this module
pythonType = doImport(f'{basePath}.{initDict.pop(typeKey)}')
args = []
if 'args' in initDict:
args = initDict.pop('args')
if isinstance(args, str):
args = [args]
try:
element = pythonType(*args, **initDict)
except Exception as e:
message = f'Error in constructing functor "{name}" of type {pythonType.__name__} with args: {args}'
raise type(e)(message, e.args)
return element