diff --git a/scripts/gen_regex.py b/scripts/gen_regex.py
index fb94f17..1c5f6f5 100644
--- a/scripts/gen_regex.py
+++ b/scripts/gen_regex.py
@@ -4,8 +4,10 @@ from ftfy import chardata
 import pathlib
 from pkg_resources import resource_filename
 
+
 DATA_PATH = pathlib.Path(resource_filename('wordfreq', 'data'))
 
+
 def _emoji_char_class():
     """
     Build a regex for emoji substitution.  First we create a regex character set
@@ -28,6 +30,7 @@ def _emoji_char_class():
     with emoji_file.open(mode='w') as file:
         file.write(out)
 
+
 def _non_punct_class():
     """
     Builds a regex that matches anything that is not a one of the following
@@ -46,6 +49,7 @@ def _non_punct_class():
     with non_punct_file.open(mode='w') as file:
         file.write(out)
 
+
 def _combining_mark_class():
     """
     Builds a regex that matches anything that is a combining mark
@@ -56,6 +60,7 @@ def _combining_mark_class():
     with combining_mark_file.open(mode='w') as file:
         file.write(out)
 
+
 def func_to_regex(accept):
     """
     Converts a function that accepts a single unicode character into a regex.
@@ -85,6 +90,7 @@ def func_to_regex(accept):
 
     return '[%s]' % ''.join(ranges)
 
+
 if __name__ == '__main__':
     _combining_mark_class()
     _non_punct_class()
diff --git a/wordfreq/__init__.py b/wordfreq/__init__.py
index f7a1948..9cc1b8d 100644
--- a/wordfreq/__init__.py
+++ b/wordfreq/__init__.py
@@ -14,6 +14,7 @@ DATA_PATH = pathlib.Path(resource_filename('wordfreq', 'data'))
 
 CACHE_SIZE = 100000
 
+
 def _emoji_char_class():
     """
     Build a regex for emoji substitution.  First we create a regex character set
@@ -25,6 +26,7 @@ def _emoji_char_class():
     with non_punct_file.open() as file:
         return file.read()
 
+
 def _non_punct_class():
     """
     Builds a regex that matches anything that is not a one of the following
@@ -40,6 +42,7 @@ def _non_punct_class():
     with non_punct_file.open() as file:
         return file.read()
 
+
 def _combining_mark_class():
     """
     Builds a regex that matches anything that is a combining mark
@@ -55,6 +58,7 @@ NON_PUNCT_RANGE = _non_punct_class()
 
 TOKEN_RE = re.compile("{0}|{1}+(?:'{1}+)*".format(EMOJI_RANGE, NON_PUNCT_RANGE))
 
+
 def simple_tokenize(text):
     """
     A simple tokenizer that can be applied to most languages.
@@ -71,6 +75,7 @@ def simple_tokenize(text):
     """
     return [token.casefold() for token in TOKEN_RE.findall(text)]
 
+
 def tokenize(text, lang):
     """
     Tokenize this text in a way that's straightforward but appropriate for