diff --git a/umap/utils.py b/umap/utils.py
index 9afe69b4..0890dbfd 100644
--- a/umap/utils.py
+++ b/umap/utils.py
@@ -6,7 +6,7 @@ from django.urls import URLPattern, URLResolver
 
 
 def get_uri_template(urlname, args=None, prefix=""):
-    '''
+    """
     Utility function to return an URI Template from a named URL in django
     Copied from django-digitalpaper.
 
@@ -18,21 +18,22 @@ def get_uri_template(urlname, args=None, prefix=""):
       non-capturing parenthesis in them) by trying to find a pattern
       whose optional parameters match those you specified (a parameter
       is considered optional if it doesn't appear in every pattern possibility)
-    '''
+    """
+
     def _convert(template, args=None):
         """URI template converter"""
         if not args:
             args = []
         paths = template % dict([p, "{%s}" % p] for p in args)
-        return u'%s/%s' % (prefix, paths)
+        return "%s/%s" % (prefix, paths)
 
     resolver = get_resolver(None)
-    parts = urlname.split(':')
+    parts = urlname.split(":")
     if len(parts) > 1 and parts[0] in resolver.namespace_dict:
         namespace = parts[0]
         urlname = parts[1]
         nprefix, resolver = resolver.namespace_dict[namespace]
-        prefix = prefix + '/' + nprefix.rstrip('/')
+        prefix = prefix + "/" + nprefix.rstrip("/")
     possibilities = resolver.reverse_dict.getlist(urlname)
     for tmp in possibilities:
         possibility, pattern = tmp[:2]
@@ -61,7 +62,6 @@ def get_uri_template(urlname, args=None, prefix=""):
 
 
 class DecoratedURLPattern(URLPattern):
-
     def resolve(self, *args, **kwargs):
         result = URLPattern.resolve(self, *args, **kwargs)
         if result:
@@ -97,6 +97,7 @@ def decorated_patterns(func, *urls):
                         if not hasattr(pp, "_decorate_with"):
                             setattr(pp, "_decorate_with", [])
                         pp._decorate_with.append(func)
+
     if func:
         if not isinstance(func, (list, tuple)):
             func = [func]
@@ -108,11 +109,11 @@ def decorated_patterns(func, *urls):
 
 def gzip_file(from_path, to_path):
     stat = os.stat(from_path)
-    with open(from_path, 'rb') as f_in:
-        with gzip.open(to_path, 'wb') as f_out:
+    with open(from_path, "rb") as f_in:
+        with gzip.open(to_path, "wb") as f_out:
             f_out.writelines(f_in)
     os.utime(to_path, (stat.st_mtime, stat.st_mtime))
 
 
 def is_ajax(request):
-    return request.headers.get('x-requested-with') == 'XMLHttpRequest'
+    return request.headers.get("x-requested-with") == "XMLHttpRequest"