Feature extraction and vectorizer three sentences

@@ -83,7 +83,7 @@ if __name__ == "__main__":
 
     with open(os.path.join(args.outputPath, "report-vectorizer.{}.txt".format(args.vectorizer)), encoding="utf-8", mode="w") as oFile:
         oFile.write("Vectorizer: {}".format(args.vectorizer))
-        oFile.write(vectorizer.get_feature_names())
-        oFile.write(matrix)
+        oFile.write(str(vectorizer.get_feature_names()))
+        oFile.write(str(matrix))
 
     print("Feature extraction and vectorizer in: %fs" % (time() - t0))