Fix classify text tutorial

Change-Id: I7d133862f2e9305c978ec6fb4c8168640f3d08ed

Author: Jon Wayne Parrott

language/classify_text/classify_text_tutorial.py

@@ -86,11 +86,11 @@ def index(path, index_file):
                 categories = classify(text, verbose=False)
 
                 result[filename] = categories
-        except:
+        except Exception:
             print('Failed to process {}'.format(file_path))
 
     with io.open(index_file, 'w') as f:
-        f.write(unicode(json.dumps(result)))
+        f.write(json.dumps(result).encode('utf-8'))
 
     print('Texts indexed in file: {}'.format(index_file))
     return result

language/classify_text/classify_text_tutorial_test.py

@@ -13,9 +13,10 @@
 
 import os
 
-import classify_text_tutorial
 import pytest
 
+import classify_text_tutorial
+
 
 OUTPUT = 'index.json'
 RESOURCES = os.path.join(os.path.dirname(__file__), 'resources')