utils: raspberrypi: ctt: Fix pycodestyle E305

E305 expected 2 blank lines after class or function definition

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Reviewed-by: David Plowman <david.plowman@raspberrypi.com>

utils/raspberrypi/ctt/ctt_tools.py

@@ -48,6 +48,8 @@ def get_config(dictt, key, default, ttype):
     except (KeyError, ValueError):
         val = default
     return val
+
+
 """
 argument parser
 """
@@ -67,6 +69,8 @@ def parse_input():
     if json_output is None:
         raise ArgError('\n\nERROR! No output json given.')
     return json_output, directory, config, log_path
+
+
 """
 custom arg and macbeth error class
 """
@@ -75,6 +79,7 @@ class ArgError(Exception):
 class MacbethError(Exception):
     pass
 
+
 """
 correlation function to quantify match
 """
@@ -84,6 +89,7 @@ def correlate(im1, im2):
     cor = np.corrcoef(f1, f2)
     return cor[0][1]
 
+
 """
 get list of files from directory
 """
@@ -94,6 +100,7 @@ def get_photos(directory='photos'):
             filename_list.append(filename)
     return filename_list
 
+
 """
 display image for debugging... read at your own risk...
 """