update paraphrasing code to fix an error

Author: x4nth055

machine-learning/nlp/text-paraphrasing/Paraphrasing_with_Transformers_PythonCode.ipynb

@@ -644,8 +644,9 @@
         "  print(\"Input_phrase: \", phrase)\n",
         "  print(\"-\"*100)\n",
         "  paraphrases = parrot.augment(input_phrase=phrase)\n",
-        "  for paraphrase in paraphrases:\n",
-        "   print(paraphrase)"
+        "  if paraphrases:\n",
+        "    for paraphrase in paraphrases:\n",
+        "      print(paraphrase)"
       ]
     }
   ],

machine-learning/nlp/text-paraphrasing/paraphrasing_with_transformers_pythoncode.py

@@ -61,6 +61,7 @@ def get_paraphrased_sentences(model, tokenizer, sentence, num_return_sequences=5
   print("Input_phrase: ", phrase)
   print("-"*100)
   paraphrases = parrot.augment(input_phrase=phrase)
-  for paraphrase in paraphrases:
-   print(paraphrase)
+  if paraphrases:
+    for paraphrase in paraphrases:
+      print(paraphrase)