Migrate metrics used in flax examples to Evaluate (#18348)

Currently, tensorflow examples use the `load_metric` function from
Datasets library, commit migrates function call to `load` function
from Evaluate library.

examples/flax/_tests_requirements.txt

@@ -5,3 +5,4 @@ nltk
 rouge-score
 seqeval
 tensorboard
+evaluate >= 0.2.0
\ No newline at end of file

examples/flax/image-captioning/run_image_captioning_flax.py

@@ -31,10 +31,11 @@ from typing import Callable, Optional
 import datasets
 import nltk  # Here to have a nice missing dependency error message early on
 import numpy as np
-from datasets import Dataset, load_dataset, load_metric
+from datasets import Dataset, load_dataset
 from PIL import Image
 from tqdm import tqdm
 
+import evaluate
 import jax
 import jax.numpy as jnp
 import optax
@@ -811,7 +812,7 @@ def main():
                 yield batch
 
     # Metric
-    metric = load_metric("rouge")
+    metric = evaluate.load("rouge")
 
     def postprocess_text(preds, labels):
         preds = [pred.strip() for pred in preds]

examples/flax/question-answering/run_qa.py

@@ -32,9 +32,10 @@ from typing import Any, Callable, Dict, Optional, Tuple
 
 import datasets
 import numpy as np
-from datasets import load_dataset, load_metric
+from datasets import load_dataset
 from tqdm import tqdm
 
+import evaluate
 import jax
 import jax.numpy as jnp
 import optax
@@ -776,7 +777,7 @@ def main():
         references = [{"id": ex["id"], "answers": ex[answer_column_name]} for ex in examples]
         return EvalPrediction(predictions=formatted_predictions, label_ids=references)
 
-    metric = load_metric("squad_v2" if data_args.version_2_with_negative else "squad")
+    metric = evaluate.load("squad_v2" if data_args.version_2_with_negative else "squad")
 
     def compute_metrics(p: EvalPrediction):
         return metric.compute(predictions=p.predictions, references=p.label_ids)

examples/flax/summarization/run_summarization_flax.py

@@ -33,9 +33,10 @@ from typing import Callable, Optional
 import datasets
 import nltk  # Here to have a nice missing dependency error message early on
 import numpy as np
-from datasets import Dataset, load_dataset, load_metric
+from datasets import Dataset, load_dataset
 from tqdm import tqdm
 
+import evaluate
 import jax
 import jax.numpy as jnp
 import optax
@@ -656,7 +657,7 @@ def main():
         )
 
     # Metric
-    metric = load_metric("rouge")
+    metric = evaluate.load("rouge")
 
     def postprocess_text(preds, labels):
         preds = [pred.strip() for pred in preds]

examples/flax/text-classification/run_flax_glue.py

@@ -27,9 +27,10 @@ from typing import Any, Callable, Dict, Optional, Tuple
 
 import datasets
 import numpy as np
-from datasets import load_dataset, load_metric
+from datasets import load_dataset
 from tqdm import tqdm
 
+import evaluate
 import jax
 import jax.numpy as jnp
 import optax
@@ -570,9 +571,9 @@ def main():
     p_eval_step = jax.pmap(eval_step, axis_name="batch")
 
     if data_args.task_name is not None:
-        metric = load_metric("glue", data_args.task_name)
+        metric = evaluate.load("glue", data_args.task_name)
     else:
-        metric = load_metric("accuracy")
+        metric = evaluate.load("accuracy")
 
     logger.info(f"===== Starting training ({num_epochs} epochs) =====")
     train_time = 0

examples/flax/token-classification/run_flax_ner.py

@@ -29,9 +29,10 @@ from typing import Any, Callable, Dict, Optional, Tuple
 
 import datasets
 import numpy as np
-from datasets import ClassLabel, load_dataset, load_metric
+from datasets import ClassLabel, load_dataset
 from tqdm import tqdm
 
+import evaluate
 import jax
 import jax.numpy as jnp
 import optax
@@ -646,7 +647,7 @@ def main():
 
     p_eval_step = jax.pmap(eval_step, axis_name="batch")
 
-    metric = load_metric("seqeval")
+    metric = evaluate.load("seqeval")
 
     def get_labels(y_pred, y_true):
         # Transform predictions and references tensos to numpy arrays