diff --git a/tests/test_extract.py b/tests/test_extract.py
index b9a3075..a74a576 100644
--- a/tests/test_extract.py
+++ b/tests/test_extract.py
@@ -10,7 +10,7 @@
 import sys
 sys.path.append('../')
 
-from StringIO import StringIO
+from io import StringIO
 import unittest
 
 from tornadobabel.extract import extract_tornado
diff --git a/tornadobabel/extract.py b/tornadobabel/extract.py
index e30f7ee..90c6bdc 100644
--- a/tornadobabel/extract.py
+++ b/tornadobabel/extract.py
@@ -66,7 +66,7 @@ def extract_from_node(expression, gettext_functions=None):
         gettext_functions = GETTEXT_FUNCTIONS
 
     for node in ast.walk(ast.parse(expression.expression)):
-        # Recursively walk through all descendant nodes 
+        # Recursively walk through all descendant nodes
         if isinstance(node, ast.Call):
             # If the type is a function call
             if not (
@@ -83,9 +83,9 @@ def extract_from_node(expression, gettext_functions=None):
 
             for arg in node.keywords:
                 strings.append(None)
-            if node.starargs is not None:
+            if hasattr(node, 'startags') and node.starargs:
                 strings.append(None)
-            if node.kwargs is not None:
+            if hasattr(node, 'kwargs') and node.kwargs:
                 strings.append(None)
 
             if len(strings) == 1:
@@ -110,14 +110,15 @@ def extract_tornado(fileobj, keywords, comment_tags, options):
     :return: an iterator over ``(lineno, funcname, message, comments)`` tuples
     :rtype: ``iterator``
     """
+    filename = fileobj.name if hasattr(fileobj, 'name') else options.get('name', '<string>')
     template = DummyTemplate(
         fileobj.read(),
-        file.name or options.get('name', '<string>'),
+        filename,
     )
 
     for node in walk(template.file):
         if isinstance(node, _Expression):
             for lineno, func, message in extract_from_node(node):
-                # TODO: Implement the comment feature, right now an empty 
+                # TODO: Implement the comment feature, right now an empty
                 # iterable is returned
                 yield lineno, func, message, []
diff --git a/tornadobabel/locale.py b/tornadobabel/locale.py
index 86ab055..fbe6e4b 100644
--- a/tornadobabel/locale.py
+++ b/tornadobabel/locale.py
@@ -4,7 +4,7 @@
     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 
     The locale support of tornado as such is pretty basic and does not offer
-    support for merging translation catalogs and several other features most 
+    support for merging translation catalogs and several other features most
     multi language applications require.
 
     This module tries to retain the same API as that of tornado.locale while
@@ -19,7 +19,7 @@
 
     :changes:
         12/11/23 - E. PASCUAL (Centre Scientifique et Technique du Batiment):
-            fixed implementation of translations merge process in 
+            fixed implementation of translations merge process in
             load_gettext_translations
 """
 import gettext
@@ -61,7 +61,7 @@ def set_default_locale(code):
     global _default_locale
     global _supported_locales
     _default_locale = code
-    _supported_locales = frozenset(_translations.keys() + [_default_locale])
+    _supported_locales = frozenset(list(_translations.keys()) + [_default_locale])
 
 
 def load_gettext_translations(directory, domain):
@@ -80,11 +80,11 @@ def load_gettext_translations(directory, domain):
                 _translations[lang].merge(translation)
             else:
                 _translations[lang] = translation
-                
-        except Exception, e:
+
+        except Exception as e:
             logging.error("Cannot load translation for '%s': %s", lang, str(e))
             continue
-    _supported_locales = frozenset(_translations.keys() + [_default_locale])
+    _supported_locales = frozenset(list(_translations.keys()) + [_default_locale])
     _use_gettext = True
     logging.info("Supported locales: %s", sorted(_supported_locales))
 
diff --git a/tornadobabel/mixin.py b/tornadobabel/mixin.py
index b372f90..e3694b2 100644
--- a/tornadobabel/mixin.py
+++ b/tornadobabel/mixin.py
@@ -71,7 +71,7 @@ def get_browser_locale(self, default="en_US"):
                     score = 1.0
                 locales.append((parts[0], score))
             if locales:
-                locales.sort(key=lambda (l, s): s, reverse=True)
+                locales.sort(key=lambda l, s: s, reverse=True)
                 codes = [l[0] for l in locales]
                 return locale.get(*codes)
         return locale.get(default)