fixes progress bar when using the 'verbose=True' argument.

PROBLEM:
previously, this flag resulted in multiple progress bars being
generated. this was due to having a progress bar for both the main
loop and for the encoding step.

SOLUTION:
removed the progress bar for the encoding step. also added argument
to main progress bar so that a bar actually shows and not just a
timer.

encoder_models.py

@@ -64,7 +64,6 @@ class SBertEncoder(Encoder):
                 prediction,
                 device=self.device,
                 batch_size=self.batch_size,
-                show_progress_bar=self.verbose,
             )
 
         return embeddings

semncg.py

@@ -441,6 +441,11 @@ class SemNCG(evaluate.Metric):
 
         # Validate inputs corresponding to flags
         _validate_input_format(tokenize_sentences, predictions, references, documents)
+        
+        try:
+            N = len(predictions)
+        except Exception as e:
+            N = None
 
         # Get GPU
         device = get_gpu(gpu)
@@ -479,7 +484,7 @@ class SemNCG(evaluate.Metric):
             iterable_obj = zip(predictions, references, documents)
 
         out = []
-        for idx, (pred, ref, doc) in enumerate(tqdm(iterable_obj)):
+        for idx, (pred, ref, doc) in tqdm(enumerate(iterable_obj), total=N):
 
             if not pre_compute_embeddings:  # Compute embeddings
                 ref_sentences = tokenize_and_prep_document(ref, tokenize_sentences)