1 files changed, 6 insertions, 6 deletions
diff --git a/numpy/fft/helper.py b/numpy/fft/helper.py
index 058f6864d..2e35f6db6 100644
--- a/numpy/fft/helper.py
+++ b/numpy/fft/helper.py
@@ -68,8 +68,8 @@ def fftshift(x, axes=None):
     for k in axes:
         n = tmp.shape[k]
         p2 = (n+1)//2
-        mylist = concatenate((arange(p2,n),arange(p2)))
-        y = take(y,mylist,k)
+        mylist = concatenate((arange(p2, n), arange(p2)))
+        y = take(y, mylist, k)
     return y
 
 
@@ -116,8 +116,8 @@ def ifftshift(x, axes=None):
     for k in axes:
         n = tmp.shape[k]
         p2 = n-(n+1)//2
-        mylist = concatenate((arange(p2,n),arange(p2)))
-        y = take(y,mylist,k)
+        mylist = concatenate((arange(p2, n), arange(p2)))
+        y = take(y, mylist, k)
     return y
 
 
@@ -157,7 +157,7 @@ def fftfreq(n, d=1.0):
     array([ 0.  ,  1.25,  2.5 ,  3.75, -5.  , -3.75, -2.5 , -1.25])
 
     """
-    if not (isinstance(n,int) or isinstance(n, integer)):
+    if not (isinstance(n, int) or isinstance(n, integer)):
         raise ValueError("n should be an integer")
     val = 1.0 / (n * d)
     results = empty(n, int)
@@ -213,7 +213,7 @@ def rfftfreq(n, d=1.0):
     array([  0.,  10.,  20.,  30.,  40.,  50.])
 
     """
-    if not (isinstance(n,int) or isinstance(n, integer)):
+    if not (isinstance(n, int) or isinstance(n, integer)):
         raise ValueError("n should be an integer")
     val = 1.0/(n*d)
     N = n//2 + 1