Formatting changes

ssim.py

@@ -21,15 +21,17 @@
 
 from numpy.lib.stride_tricks import as_strided as ast
 
-# Hat tip: http://stackoverflow.com/a/5078155/1828289
+"""
+Hat tip: http://stackoverflow.com/a/5078155/1828289
+"""
 def block_view(A, block=(3, 3)):
     """Provide a 2D block view to 2D array. No error checking made.
     Therefore meaningful (as implemented) only for blocks strictly
     compatible with the shape of A."""
     # simple shape and strides computations may seem at first strange
     # unless one is able to recognize the 'tuple additions' involved ;-)
-    shape= (A.shape[0]/ block[0], A.shape[1]/ block[1])+ block
-    strides= (block[0]* A.strides[0], block[1]* A.strides[1])+ A.strides
+    shape = (A.shape[0]/ block[0], A.shape[1]/ block[1])+ block
+    strides = (block[0]* A.strides[0], block[1]* A.strides[1])+ A.strides
     return ast(A, shape= shape, strides= strides)