Method on_test_begin

tensorflow/python/keras/callbacks.py:1632–1633

(self, logs=None)

      self._is_tracing = True

  def on_test_begin(self, logs=None):
    self._set_default_writer(self._validation_run_name)

  def on_train_batch_end(self, batch, logs=None):
    """Writes scalar summaries for metrics on every training batch.