PEP-8 fixes

wagtail/utils/sendfile.py

@@ -1,20 +1,21 @@
 # Copied from django-sendfile 0.3.6 and tweaked to allow a backend to be passed
 # to sendfile()
 # See: https://github.com/johnsensible/django-sendfile/pull/33
+import os.path
+from mimetypes import guess_type
 
 VERSION = (0, 3, 6)
 __version__ = '.'.join(map(str, VERSION))
 
-import os.path
-from mimetypes import guess_type
-
 
 def _lazy_load(fn):
     _cached = []
+
     def _decorated():
         if not _cached:
             _cached.append(fn())
         return _cached[0]
+
     def clear():
         while _cached:
             _cached.pop()
@@ -35,7 +36,6 @@ def _get_sendfile():
     return module.sendfile
 
 
-
 def sendfile(request, filename, attachment=False, attachment_filename=None, mimetype=None, encoding=None, backend=None):
     '''
     create a response to send file using backend configured in SENDFILE_BACKEND
@@ -64,7 +64,7 @@ def sendfile(request, filename, attachment=False, attachment_filename=None, mime
             mimetype = guessed_mimetype
         else:
             mimetype = 'application/octet-stream'
-        
+
     response = _sendfile(request, filename, mimetype=mimetype)
     if attachment:
         if attachment_filename is None:

wagtail/utils/sendfile_streaming_backend.py

@@ -10,7 +10,6 @@ except ImportError:
     from email.Utils import parsedate_tz, mktime_tz
 from wsgiref.util import FileWrapper
 
-from django.core.files.base import File
 from django.http import StreamingHttpResponse, HttpResponseNotModified
 from django.utils.http import http_date
 
@@ -60,4 +59,3 @@ def was_modified_since(header=None, mtime=0, size=0):
     except (AttributeError, ValueError, OverflowError):
         return True
     return False
-