fix parameter names in the estimator api

python/mxnet/gluon/contrib/estimator/batch_processor.py

@@ -61,8 +61,8 @@ def evaluate_batch(self, estimator,
             Batch axis to split the validation data into devices.
         """
         data, label = self._get_data_and_label(val_batch, estimator.context, batch_axis)
-        pred = [estimator.eval_net(x) for x in data]
-        loss = [estimator.evaluation_loss(y_hat, y) for y_hat, y in zip(pred, label)]
+        pred = [estimator.val_net(x) for x in data]
+        loss = [estimator.val_loss(y_hat, y) for y_hat, y in zip(pred, label)]
 
         return data, label, pred, loss
 

python/mxnet/gluon/contrib/estimator/estimator.py

@@ -61,29 +61,29 @@ class Estimator(object):
         Trainer to apply optimizer on network parameters.
     context : Context or list of Context
         Device(s) to run the training on.
-    evaluation_loss : gluon.loss.loss
-        Loss (objective) function to calculate during validation. If set evaluation_loss
-        None, it will use the same loss function as self.loss
-    eval_net : gluon.Block
+    val_net : gluon.Block
         The model used for validation. The validation model does not necessarily belong to
         the same model class as the training model. But the two models typically share the
         same architecture. Therefore the validation model can reuse parameters of the
         training model.
 
-        The code example of consruction of eval_net sharing the same network parameters as
+        The code example of consruction of val_net sharing the same network parameters as
         the training net is given below:
 
         >>> net = _get_train_network()
-        >>> eval_net = _get_test_network(params=net.collect_params())
+        >>> val_net = _get_test_network(params=net.collect_params())
         >>> net.initialize(ctx=ctx)
-        >>> est = Estimator(net, loss, eval_net=eval_net)
+        >>> est = Estimator(net, loss, val_net=val_net)
 
         Proper namespace match is required for weight sharing between two networks. Most networks
         inheriting :py:class:`Block` can share their parameters correctly. An exception is
         Sequential networks that Block scope must be specified for correct weight sharing. For
         the  naming in mxnet Gluon API, please refer to the site
         (https://mxnet.apache.org/api/python/docs/tutorials/packages/gluon/blocks/naming.html)
         for future information.
+    val_loss : gluon.loss.loss
+        Loss (objective) function to calculate during validation. If set val_loss
+        None, it will use the same loss function as self.loss
     batch_processor: BatchProcessor
         BatchProcessor provides customized fit_batch() and evaluate_batch() methods
     """
@@ -113,21 +113,21 @@ def __init__(self, net,
                  initializer=None,
                  trainer=None,
                  context=None,
-                 evaluation_loss=None,
-                 eval_net=None,
+                 val_net=None,
+                 val_loss=None,
                  batch_processor=None):
         self.net = net
         self.loss = self._check_loss(loss)
         self._train_metrics = _check_metrics(train_metrics)
         self._val_metrics = _check_metrics(val_metrics)
         self._add_default_training_metrics()
         self._add_validation_metrics()
-        self.evaluation_loss = self.loss
-        if evaluation_loss is not None:
-            self.evaluation_loss = self._check_loss(evaluation_loss)
-        self.eval_net = self.net
-        if eval_net is not None:
-            self.eval_net = eval_net
+        self.val_loss = self.loss
+        if val_loss is not None:
+            self.val_loss = self._check_loss(val_loss)
+        self.val_net = self.net
+        if val_net is not None:
+            self.val_net = val_net
 
         self.logger = logging.Logger(name='Estimator', level=logging.INFO)
         self.logger.addHandler(logging.StreamHandler(sys.stdout))

tests/python/unittest/test_gluon_batch_processor.py

@@ -84,7 +84,7 @@ def test_batch_processor_validation():
     ctx = mx.cpu()
     loss = gluon.loss.L2Loss()
     acc = mx.metric.Accuracy()
-    evaluation_loss = gluon.loss.L1Loss()
+    val_loss = gluon.loss.L1Loss()
     net.initialize(ctx=ctx)
     processor = BatchProcessor()
     trainer = gluon.Trainer(net.collect_params(), 'sgd', {'learning_rate': 0.001})
@@ -93,7 +93,7 @@ def test_batch_processor_validation():
                     train_metrics=acc,
                     trainer=trainer,
                     context=ctx,
-                    evaluation_loss=evaluation_loss,
+                    val_loss=val_loss,
                     batch_processor=processor)
     # Input dataloader
     est.fit(train_data=dataloader,

tests/python/unittest/test_gluon_estimator.py

@@ -88,15 +88,15 @@ def test_validation():
     ctx = mx.cpu()
     loss = gluon.loss.L2Loss()
     acc = mx.metric.Accuracy()
-    evaluation_loss = gluon.loss.L1Loss()
+    val_loss = gluon.loss.L1Loss()
     net.initialize(ctx=ctx)
     trainer = gluon.Trainer(net.collect_params(), 'sgd', {'learning_rate': 0.001})
     est = Estimator(net=net,
                     loss=loss,
                     train_metrics=acc,
                     trainer=trainer,
                     context=ctx,
-                    evaluation_loss=evaluation_loss)
+                    val_loss=val_loss)
     # Input dataloader
     est.fit(train_data=dataloader,
             val_data=dataloader,
@@ -376,16 +376,16 @@ def test_default_handlers():
     assert isinstance(handlers[1], MetricHandler)
     assert isinstance(handlers[4], LoggingHandler)
 
-def test_eval_net():
-    ''' test estimator with a different evaluation net '''
+def test_val_net():
+    ''' test estimator with different training and validation networks '''
     ''' test weight sharing of sequential networks without namescope '''
     net = _get_test_network()
-    eval_net = _get_test_network(params=net.collect_params())
+    val_net = _get_test_network(params=net.collect_params())
     dataloader, dataiter = _get_test_data()
     num_epochs = 1
     ctx = mx.cpu()
     loss = gluon.loss.L2Loss()
-    evaluation_loss = gluon.loss.L2Loss()
+    val_loss = gluon.loss.L2Loss()
     acc = mx.metric.Accuracy()
     net.initialize(ctx=ctx)
     trainer = gluon.Trainer(net.collect_params(), 'sgd', {'learning_rate': 0.001})
@@ -394,8 +394,8 @@ def test_eval_net():
                     train_metrics=acc,
                     trainer=trainer,
                     context=ctx,
-                    evaluation_loss=evaluation_loss,
-                    eval_net=eval_net)
+                    val_loss=val_loss,
+                    val_net=val_net)
 
     with assert_raises(RuntimeError):
         est.fit(train_data=dataloader,
@@ -404,16 +404,16 @@ def test_eval_net():
 
     ''' test weight sharing of sequential networks with namescope '''
     net = _get_test_network_with_namescope()
-    eval_net = _get_test_network_with_namescope(params=net.collect_params())
+    val_net = _get_test_network_with_namescope(params=net.collect_params())
     net.initialize(ctx=ctx)
     trainer = gluon.Trainer(net.collect_params(), 'sgd', {'learning_rate': 0.001})
     est = Estimator(net=net,
                     loss=loss,
                     train_metrics=acc,
                     trainer=trainer,
                     context=ctx,
-                    evaluation_loss=evaluation_loss,
-                    eval_net=eval_net)
+                    val_loss=val_loss,
+                    val_net=val_net)
 
     est.fit(train_data=dataloader,
             val_data=dataloader,
@@ -422,20 +422,20 @@ def test_eval_net():
     ''' test weight sharing of two resnets '''
     net = gluon.model_zoo.vision.resnet18_v1(pretrained=False, ctx=ctx)
     net.output = gluon.nn.Dense(10)
-    eval_net = gluon.model_zoo.vision.resnet18_v1(pretrained=False, ctx=ctx)
-    eval_net.output = gluon.nn.Dense(10, params=net.collect_params())
+    val_net = gluon.model_zoo.vision.resnet18_v1(pretrained=False, ctx=ctx)
+    val_net.output = gluon.nn.Dense(10, params=net.collect_params())
     dataset = gluon.data.ArrayDataset(mx.nd.zeros((10, 3, 224, 224)), mx.nd.zeros((10, 10)))
     dataloader = gluon.data.DataLoader(dataset=dataset, batch_size=5)
     net.initialize(ctx=ctx)
-    eval_net.initialize(ctx=ctx)
+    val_net.initialize(ctx=ctx)
     trainer = gluon.Trainer(net.collect_params(), 'sgd', {'learning_rate': 0.001})
     est = Estimator(net=net,
                     loss=loss,
                     train_metrics=acc,
                     trainer=trainer,
                     context=ctx,
-                    evaluation_loss=evaluation_loss,
-                    eval_net=eval_net)
+                    val_loss=val_loss,
+                    val_net=val_net)
 
     est.fit(train_data=dataloader,
             val_data=dataloader,