Evaluator¶

class paddle.v2.fluid.evaluator.Evaluator(name, **kwargs)

Base Class for all evaluators

Parameters:	name (str) – The name of evaluator. such as, “accuracy”. Used for generate temporary variable name. main_program (Program, optional) – The evaluator should be added to this main_program. Default default_main_program() startup_program (Program, optional) – The parameter should be added to this startup_program. Default default_startup_program()

states¶: list – The list of state variables. states will be reset to zero when reset is invoked.

metrics¶: list – The list of metrics variables. They will be calculate every mini-batch

reset(executor, reset_program=None): reset metric states at the begin of each pass/user specified batch

eval(executor, eval_program=None): Evaluate the statistics merged by multiple mini-batches.

create_state(suffix, dtype, shape)

Create state variable.

NOTE: It is not a public API.

Parameters:	suffix (str) – the state suffix. dtype (str\|core.DataType) – the state data type shape (tuple\|list) – the shape of state

Returns: State variable