add file open modes based on python version

spellchecker/spellchecker.py

@@ -324,8 +324,8 @@ def tokenize(self, text):
                 str: The next `word` in the tokenized string
             Note:
                 This is the same as the `spellchecker.split_words()` """
-        for x in self._tokenizer(text):
-            yield x.lower()
+        for word in self._tokenizer(text):
+            yield word.lower()
 
     def keys(self):
         """ Iterator over the key of the dictionary

spellchecker/utils.py

@@ -8,9 +8,12 @@
     import io  # python 2 text file encoding support
 
     OPEN = io.open  # hijack this
+    READMODE = 'rb'
+    WRITEMODE = 'wb'
 else:
     OPEN = open
-
+    READMODE = 'rt'
+    WRITEMODE = 'wt'
 
 @contextlib.contextmanager
 def load_file(filename, encoding):
@@ -24,7 +27,7 @@ def load_file(filename, encoding):
             str: The string data from the file read
     """
     try:
-        with gzip.open(filename, mode="rt") as fobj:
+        with gzip.open(filename, mode=READMODE) as fobj:
             yield fobj.read()
     except (OSError, IOError):
         with OPEN(filename, mode="r", encoding=encoding) as fobj:
@@ -42,7 +45,7 @@ def write_file(filepath, encoding, gzipped, data):
             data (str): The data to be written out
     """
     if gzipped:
-        with gzip.open(filepath, "wt") as fobj:
+        with gzip.open(filepath, WRITEMODE) as fobj:
             fobj.write(data)
     else:
         with OPEN(filepath, "w", encoding=encoding) as fobj: