utils: raspberrypi: ctt: Fix pycodestyle E302

E302 expected 2 blank lines, found 0

Note that issues are still flagged, due to the use of docstrings as
multi-lines comments. This will be addressed separately.

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.py

@@ -34,6 +34,7 @@ blank json file. This has been done to avoid reproducing the entire json file
 in the code here, thereby avoiding unecessary clutter.
 """
 
+
 """
 Get the colour and lux values from the strings of each inidvidual image
 """
@@ -702,6 +703,7 @@ class Camera:
             self.log += '\nERROR: Images are from different cameras'
             return 0
 
+
 def run_ctt(json_output, directory, config, log_output):
     """
     check input files are jsons

utils/raspberrypi/ctt/ctt_alsc.py

@@ -9,6 +9,7 @@ import matplotlib.pyplot as plt
 from matplotlib import cm
 from mpl_toolkits.mplot3d import Axes3D
 
+
 """
 preform alsc calibration on a set of images
 """

utils/raspberrypi/ctt/ctt_awb.py

@@ -9,6 +9,7 @@ import matplotlib.pyplot as plt
 from bisect import bisect_left
 from scipy.optimize import fmin
 
+
 """
 obtain piecewise linear approximation for colour curve
 """

utils/raspberrypi/ctt/ctt_ccm.py

@@ -7,6 +7,7 @@
 from ctt_image_load import *
 from ctt_awb import get_alsc_patches
 
+
 """
 takes 8-bit macbeth chart values, degammas and returns 16 bit
 """

utils/raspberrypi/ctt/ctt_geq.py

@@ -8,6 +8,7 @@ from ctt_tools import *
 import matplotlib.pyplot as plt
 import scipy.optimize as optimize
 
+
 """
 Uses green differences in macbeth patches to fit green equalisation threshold
 model. Ideally, all macbeth chart centres would fall below the threshold as

utils/raspberrypi/ctt/ctt_image_load.py

@@ -210,6 +210,7 @@ class Image:
         self.patches = all_patches
         return 1
 
+
 def brcm_load_image(Cam, im_str):
     """
     Load image where raw data and metadata is in the BRCM format
@@ -290,6 +291,7 @@ def brcm_load_image(Cam, im_str):
 
     return Img
 
+
 def dng_load_image(Cam, im_str):
     try:
         Img = Image(None)

utils/raspberrypi/ctt/ctt_lux.py

@@ -5,6 +5,8 @@
 # ctt_lux.py - camera tuning tool for lux level
 
 from ctt_tools import *
+
+
 """
 Find lux values from metadata and calculate Y
 """

utils/raspberrypi/ctt/ctt_macbeth_locator.py

@@ -13,6 +13,7 @@ NOTE: some custom functions have been used here to make the code more readable.
 These are defined in tools.py if they are needed for reference.
 """
 
+
 """
 Some inconsistencies between packages cause runtime warnings when running
 the clustering algorithm. This catches these warnings so they don't flood the
@@ -291,6 +292,7 @@ def find_macbeth(Cam, img, mac_config=(0, 0)):
 
     return(coords_fit)
 
+
 def get_macbeth_chart(img, ref_data):
     """
     function returns coordinates of macbeth chart vertices and square centres,

utils/raspberrypi/ctt/ctt_noise.py

@@ -7,6 +7,7 @@
 from ctt_image_load import *
 import matplotlib.pyplot as plt
 
+
 """
 Find noise standard deviation and fit to model:
 

utils/raspberrypi/ctt/ctt_pretty_print_json.py

@@ -4,6 +4,7 @@
 #
 # ctt_pretty_print_json.py - camera tuning tool JSON formatter
 
+
 """
 takes a collapsed json file and makes it more readable
 """
@@ -11,10 +12,12 @@ def process_file(string, fout, state):
     for c in string:
         process_char(c, fout, state)
 
+
 def print_newline(fout, state):
     fout.write('\n')
     fout.write(' '*state["indent"]*4)
 
+
 def process_char(c, fout, state):
     if c == '{':
         if not state["skipnewline"]:
@@ -61,6 +64,7 @@ def process_char(c, fout, state):
         fout.write(c)
     state["skipnewline"] = (c == '[')
 
+
 def pretty_print_json(str_in, output_filename):
     state = {"indent": 0, "inarray": [False], "arraycount": [], "skipnewline": True}
     with open(output_filename, "w") as fout:

utils/raspberrypi/ctt/ctt_ransac.py

@@ -8,6 +8,7 @@ import numpy as np
 
 scale = 2
 
+
 """
 constructs normalised macbeth chart corners for ransac algorithm
 """
@@ -57,6 +58,7 @@ def get_square_verts(c_err=0.05, scale=scale):
     # print(square_verts)
     return np.array(square_verts, np.float32), mac_norm
 
+
 def get_square_centres(c_err=0.05, scale=scale):
     """
     define macbeth square centres

utils/raspberrypi/ctt/ctt_tools.py

@@ -22,6 +22,7 @@ understanding of the code. They ar collated here to attempt to improve code
 readability in the main files.
 """
 
+
 """
 obtain config values, unless it doesnt exist, in which case pick default
 Furthermore, it can check if the input is the correct type