Source code for monai.fl.client.client_algo
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# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
# http://www.apache.org/licenses/LICENSE-2.0
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# limitations under the License.
from typing import Optional
from monai.fl.utils.exchange_object import ExchangeObject
[docs]class ClientAlgo:
"""
objective: provide an abstract base class for defining algo to run on any platform.
To define a new algo script, subclass this class and implement the
following abstract methods:
- self.train()
- self.get_weights()
- self.evaluate()
initialize(), abort(), and finalize() can be optionally be implemented to help with lifecycle management
of the class object.
"""
[docs] def initialize(self, extra: Optional[dict] = None):
"""
Call to initialize the ClientAlgo class
Args:
extra: optional extra information, e.g. dict of `ExtraItems.CLIENT_NAME` and/or `ExtraItems.APP_ROOT`
"""
pass
[docs] def finalize(self, extra: Optional[dict] = None):
"""
Call to finalize the ClientAlgo class
Args:
extra: optional extra information
"""
pass
[docs] def abort(self, extra: Optional[dict] = None):
"""
Call to abort the ClientAlgo training or evaluation
Args:
extra: optional extra information
"""
pass
[docs] def train(self, data: ExchangeObject, extra: Optional[dict] = None) -> None:
"""
Train network and produce new network from train data.
Args:
data: ExchangeObject containing current network weights to base training on.
extra: optional extra information
Returns:
None
"""
raise NotImplementedError(f"Subclass {self.__class__.__name__} must implement this method.")
[docs] def get_weights(self, extra: Optional[dict] = None) -> ExchangeObject:
"""
Get current local weights or weight differences
Args:
extra: optional extra information
Returns:
ExchangeObject: current local weights or weight differences.
ExchangeObject example::
ExchangeObject(
weights = self.trainer.network.state_dict(),
optim = None, # could be self.optimizer.state_dict()
weight_type = WeightType.WEIGHTS
)
"""
raise NotImplementedError(f"Subclass {self.__class__.__name__} must implement this method.")
[docs] def evaluate(self, data: ExchangeObject, extra: Optional[dict] = None) -> ExchangeObject:
"""
Get evaluation metrics on test data.
Args:
data: ExchangeObject with network weights to use for evaluation
extra: optional extra information
Returns:
metrics: ExchangeObject with evaluation metrics.
"""
raise NotImplementedError(f"Subclass {self.__class__.__name__} must implement this method.")