[JAX] Replace uses of jnp.array in types with jnp.ndarray. (#26703)

`jnp.array` is a function, not a type:
https://jax.readthedocs.io/en/latest/_autosummary/jax.numpy.array.html
so it never makes sense to use `jnp.array` in a type annotation. Presumably the intent was to write `jnp.ndarray` aka `jax.Array`.

Co-authored-by: Peter Hawkins <phawkins@google.com>

examples/flax/image-captioning/run_image_captioning_flax.py

@@ -381,7 +381,7 @@ def write_metric(summary_writer, metrics, train_time, step, metric_key_prefix="t
 
 def create_learning_rate_fn(
     train_ds_size: int, train_batch_size: int, num_train_epochs: int, num_warmup_steps: int, learning_rate: float
-) -> Callable[[int], jnp.array]:
+) -> Callable[[int], jnp.ndarray]:
     """Returns a linear warmup, linear_decay learning rate function."""
     steps_per_epoch = train_ds_size // train_batch_size
     num_train_steps = steps_per_epoch * num_train_epochs

examples/flax/language-modeling/run_clm_flax.py

@@ -326,7 +326,7 @@ def write_eval_metric(summary_writer, eval_metrics, step):
 
 def create_learning_rate_fn(
     train_ds_size: int, train_batch_size: int, num_train_epochs: int, num_warmup_steps: int, learning_rate: float
-) -> Callable[[int], jnp.array]:
+) -> Callable[[int], jnp.ndarray]:
     """Returns a linear warmup, linear_decay learning rate function."""
     steps_per_epoch = train_ds_size // train_batch_size
     num_train_steps = steps_per_epoch * num_train_epochs

examples/flax/question-answering/run_qa.py

@@ -389,7 +389,7 @@ def create_train_state(
 # region Create learning rate function
 def create_learning_rate_fn(
     train_ds_size: int, train_batch_size: int, num_train_epochs: int, num_warmup_steps: int, learning_rate: float
-) -> Callable[[int], jnp.array]:
+) -> Callable[[int], jnp.ndarray]:
     """Returns a linear warmup, linear_decay learning rate function."""
     steps_per_epoch = train_ds_size // train_batch_size
     num_train_steps = steps_per_epoch * num_train_epochs

examples/flax/speech-recognition/run_flax_speech_recognition_seq2seq.py

@@ -360,7 +360,7 @@ def write_metric(summary_writer, train_metrics, eval_metrics, train_time, step):
 
 def create_learning_rate_fn(
     num_train_steps: int, num_warmup_steps: int, learning_rate: float
-) -> Callable[[int], jnp.array]:
+) -> Callable[[int], jnp.ndarray]:
     """Returns a linear warmup, linear_decay learning rate function."""
     warmup_fn = optax.linear_schedule(init_value=0.0, end_value=learning_rate, transition_steps=num_warmup_steps)
     decay_fn = optax.linear_schedule(

examples/flax/summarization/run_summarization_flax.py

@@ -409,7 +409,7 @@ def write_metric(summary_writer, train_metrics, eval_metrics, train_time, step):
 
 def create_learning_rate_fn(
     train_ds_size: int, train_batch_size: int, num_train_epochs: int, num_warmup_steps: int, learning_rate: float
-) -> Callable[[int], jnp.array]:
+) -> Callable[[int], jnp.ndarray]:
     """Returns a linear warmup, linear_decay learning rate function."""
     steps_per_epoch = train_ds_size // train_batch_size
     num_train_steps = steps_per_epoch * num_train_epochs

examples/flax/text-classification/run_flax_glue.py

@@ -288,7 +288,7 @@ def create_train_state(
 
 def create_learning_rate_fn(
     train_ds_size: int, train_batch_size: int, num_train_epochs: int, num_warmup_steps: int, learning_rate: float
-) -> Callable[[int], jnp.array]:
+) -> Callable[[int], jnp.ndarray]:
     """Returns a linear warmup, linear_decay learning rate function."""
     steps_per_epoch = train_ds_size // train_batch_size
     num_train_steps = steps_per_epoch * num_train_epochs

examples/flax/token-classification/run_flax_ner.py

@@ -340,7 +340,7 @@ def create_train_state(
 
 def create_learning_rate_fn(
     train_ds_size: int, train_batch_size: int, num_train_epochs: int, num_warmup_steps: int, learning_rate: float
-) -> Callable[[int], jnp.array]:
+) -> Callable[[int], jnp.ndarray]:
     """Returns a linear warmup, linear_decay learning rate function."""
     steps_per_epoch = train_ds_size // train_batch_size
     num_train_steps = steps_per_epoch * num_train_epochs

examples/flax/vision/run_image_classification.py

@@ -249,7 +249,7 @@ def write_metric(summary_writer, train_metrics, eval_metrics, train_time, step):
 
 def create_learning_rate_fn(
     train_ds_size: int, train_batch_size: int, num_train_epochs: int, num_warmup_steps: int, learning_rate: float
-) -> Callable[[int], jnp.array]:
+) -> Callable[[int], jnp.ndarray]:
     """Returns a linear warmup, linear_decay learning rate function."""
     steps_per_epoch = train_ds_size // train_batch_size
     num_train_steps = steps_per_epoch * num_train_epochs