fix some pep8 issues

pipeline/compressors/__init__.py

@@ -145,7 +145,7 @@ class Compressor(object):
 
     def construct_asset_path(self, asset_path, css_path, output_filename, variant=None):
         """Return a rewritten asset URL for a stylesheet"""
-        public_path = self.absolute_path(asset_path, os.path.dirname(css_path).replace('\\','/'))
+        public_path = self.absolute_path(asset_path, os.path.dirname(css_path).replace('\\', '/'))
         if self.embeddable(public_path, variant):
             return "__EMBED__%s" % public_path
         if not posixpath.isabs(asset_path):
@@ -158,7 +158,7 @@ class Compressor(object):
         font = ext in FONT_EXTS
         if not variant:
             return False
-        if not (re.search(settings.PIPELINE_EMBED_PATH, path.replace('\\','/')) and self.storage.exists(path)):
+        if not (re.search(settings.PIPELINE_EMBED_PATH, path.replace('\\', '/')) and self.storage.exists(path)):
             return False
         if not ext in EMBED_EXTS:
             return False

pipeline/manifest.py

@@ -30,7 +30,7 @@ class PipelineManifest(Manifest):
 
     def cache(self):
         ignore_patterns = getattr(settings, "STATICFILES_IGNORE_PATTERNS", None)
-        
+
         if settings.PIPELINE:
             for package in self.packages:
                 yield str(self.packager.individual_url(package.output_filename))

pipeline/storage.py

@@ -88,7 +88,7 @@ class BaseFinderStorage(PipelineStorage):
         return path
 
     def exists(self, name):
-        exists = self.finders.find(name) != None
+        exists = self.finders.find(name) is not None
         if not exists:
             return super(BaseFinderStorage, self).exists(name)
         return exists