Calculating F1 fails due to error(AttributeError: 'float' object has no attribute 'size')

[Gholamrezadar]

When I try to calculate f1 score I get this error:

return {"f1": float(score) if score.size == 1 else score}
                                   ^^^^^^
AttributeError: 'float' object has no attribute 'size'

Code to Reproduce

import evaluate
f1_metric = evaluate.load("f1")
result = f1_metric.compute(predictions=[0, 1], references=[0, 1])
print(result["f1"])

• Tested on a default github codespaces environment and google colab.
• evaluate==0.4.3

[d-gurgurov]

Experiencing the same issue with the last three versions of evaluate :(

[d-gurgurov]

#655 - the solution is here. there is an inconsistency caused by the scikit-learn update