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"""This module defines the Data Engine Wrapper as the Backend class which constructor can initialize Backend instances
."""
import attr
from so_magic.data.magic_datapoints_factory import BroadcastingDatapointsFactory
from so_magic.data.datapoints_manager import DatapointsManager
@attr.s
class Backend:
"""Wrapper of a data engine, a datapoints manager and a datapoints factory.
Instances of this class act as data placeholders (aka data classes) and take at runtime a data engine (eg a set of
pandas-dependent implementations of the "Tabular Data interfaces" defined in so_magic.data.interfaces).
Args:
engine_instance (DataEngine): a data engine represented as a class object (eg class MyClass: pass)
"""
engine_instance = attr.ib(init=True)
datapoints_manager = attr.ib(init=False, default=attr.Factory(DatapointsManager))
datapoints_factory = attr.ib(init=True, default=attr.Factory(BroadcastingDatapointsFactory))
@property
def engine(self):
"""The Data Engine instance, that this object wraps around.
Returns:
DataEngine: the Data Engine instance object
return self.engine_instance
@engine.setter
def engine(self, engine):
"""Set the Data Engine instance to the input engine object.
engine (DataEngine): the Data Engine object to set with
self.engine_instance = engine
boromir674 /
so-magic
