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ImportError: cannot import name 'Metric' from 'ignite.metrics'

See original GitHub issue

🐛 Bug description

Unable to use Metric for calculating roc_auc_compute

Code that caused error:

from typing import Any, Callable, Tuple

import torch

from ignite.metrics import EpochMetric


def roc_auc_compute_fn(y_preds: torch.Tensor, y_targets: torch.Tensor) -> float:
    try:
        from sklearn.metrics import roc_auc_score
    except ImportError:
        raise RuntimeError("This contrib module requires sklearn to be installed.")

    y_true = y_targets.numpy()
    y_pred = y_preds.numpy()
    return roc_auc_score(y_true, y_pred)

ImportError Traceback (most recent call last) <ipython-input-25-eaec9c574c2d> in <module> 3 import torch 4 ----> 5 from ignite.metrics import EpochMetric 6 7

C:\Users\dayan\AppData\Roaming\Python\Python37\site-packages\ignite\metrics_init_.py in <module> ----> 1 from ignite.metrics.accumulation import Average, GeometricAverage, VariableAccumulation 2 from ignite.metrics.accuracy import Accuracy 3 from ignite.metrics.confusion_matrix import ConfusionMatrix, DiceCoefficient, IoU, mIoU 4 from ignite.metrics.epoch_metric import EpochMetric 5 from ignite.metrics.fbeta import Fbeta

C:\Users\dayan\AppData\Roaming\Python\Python37\site-packages\ignite\metrics\accumulation.py in <module> 5 6 from ignite.exceptions import NotComputableError ----> 7 from ignite.metrics.metric import Metric, reinit__is_reduced, sync_all_reduce 8 9 all = [“VariableAccumulation”, “GeometricAverage”, “Average”]

C:\Users\dayan\AppData\Roaming\Python\Python37\site-packages\ignite\metrics\metric.py in <module> 8 9 import ignite.distributed as idist —> 10 from ignite.engine import CallableEventWithFilter, Engine, Events 11 12 if TYPE_CHECKING:

C:\Users\dayan\AppData\Roaming\Python\Python37\site-packages\ignite\engine_init_.py in <module> 8 from ignite.engine.engine import Engine 9 from ignite.engine.events import CallableEventWithFilter, EventEnum, Events, EventsList, RemovableEventHandle, State —> 10 from ignite.metrics import Metric 11 from ignite.utils import convert_tensor 12

ImportError: cannot import name ‘Metric’ from ‘ignite.metrics’ (C:\Users\dayan\AppData\Roaming\Python\Python37\site-packages\ignite\metrics_init_.py)

I am trying to compute AUC ROC score. But error is occurring …