diff --git a/Makefile b/Makefile
index 093b286..a24d628 100644
--- a/Makefile
+++ b/Makefile
@@ -32,8 +32,8 @@ test:
 	nosetests
 
 build: clean
-	python setup.py sdist upload
-	python setup.py bdist_wheel upload
+	python setup.py sdist
+	python setup.py bdist_wheel
 
 upload: clean
 	python setup.py sdist upload
diff --git a/parsedatetime/__init__.py b/parsedatetime/__init__.py
index 781dbd4..d42681c 100644
--- a/parsedatetime/__init__.py
+++ b/parsedatetime/__init__.py
@@ -914,7 +914,7 @@ def _evalModifier(self, modifier, chunk1, chunk2, sourceTime):
                 # day-of-week, we want to start with target as the day
                 # in the current week.
                 dowOffset = offset
-                if not modifier in ['next', 'last', 'prior', 'previous']:
+                if modifier not in ['next', 'last', 'prior', 'previous']:
                     dowOffset = 0
 
                 wkdy = self.ptc.WeekdayOffsets[wkdy]
@@ -932,7 +932,7 @@ def _evalModifier(self, modifier, chunk1, chunk2, sourceTime):
                     t, subctx = self.parse(chunk1, sourceTime, VERSION_CONTEXT_STYLE)
                     if subctx.hasDateOrTime:
                         delta = time.mktime(t) - time.mktime(sourceTime)
-                        target = start + datetime.timedelta(days=diff) + datetime.timedelta(seconds = delta * offset)
+                        target = start + datetime.timedelta(days=diff) + datetime.timedelta(seconds=delta * offset)
                         chunk1 = ''
 
                 sourceTime = target.timetuple()
diff --git a/parsedatetime/context.py b/parsedatetime/context.py
index d6cab56..c1cc39a 100644
--- a/parsedatetime/context.py
+++ b/parsedatetime/context.py
@@ -62,17 +62,17 @@ class pdtContext(object):
 
     """
 
-    __slots__ = ('accuracy', )
-
-    ACU_YEAR = 2**0
-    ACU_MONTH = 2**1
-    ACU_WEEK = 2**2
-    ACU_DAY = 2**3
-    ACU_HALFDAY = 2**4
-    ACU_HOUR = 2**5
-    ACU_MIN = 2**6
-    ACU_SEC = 2**7
-    ACU_NOW = 2**8
+    __slots__ = ('accuracy',)
+
+    ACU_YEAR = 2 ** 0
+    ACU_MONTH = 2 ** 1
+    ACU_WEEK = 2 ** 2
+    ACU_DAY = 2 ** 3
+    ACU_HALFDAY = 2 ** 4
+    ACU_HOUR = 2 ** 5
+    ACU_MIN = 2 ** 6
+    ACU_SEC = 2 ** 7
+    ACU_NOW = 2 ** 8
 
     ACU_DATE = ACU_YEAR | ACU_MONTH | ACU_WEEK | ACU_DAY
     ACU_TIME = ACU_HALFDAY | ACU_HOUR | ACU_MIN | ACU_SEC | ACU_NOW