'fix' PyQgsRulebasedRenderer test (followup 08185c9a)

scripts/generate_test_mask_image.py

@@ -14,10 +14,12 @@ import struct
 import urllib2
 import glob
 
+
 def error(msg):
     print msg
     sys.exit(1)
 
+
 def colorDiff(c1, c2):
     redDiff = abs(qRed(c1) - qRed(c2))
     greenDiff = abs(qGreen(c1) - qGreen(c2))
@@ -25,6 +27,7 @@ def colorDiff( c1, c2 ):
     alphaDiff = abs(qAlpha(c1) - qAlpha(c2))
     return max(redDiff, greenDiff, blueDiff, alphaDiff)
 
+
 def imageFromPath(path):
     if (path[:7] == 'http://' or path[:7] == 'file://'):
         #fetch remote image
@@ -35,6 +38,7 @@ def imageFromPath(path):
         image = QImage(path)
     return image
 
+
 def getControlImagePath(path):
     if os.path.isfile(path):
         return path
@@ -63,6 +67,7 @@ def getControlImagePath(path):
     print 'Found matching control image: {}'.format(found_image)
     return found_image
 
+
 def updateMask(control_image_path, rendered_image_path, mask_image_path):
     control_image = imageFromPath(control_image_path)
     if not control_image: