Format files with black

- Format all files with black
- Update tox.ini flake8 arguments to be compatible
- Add black to requirements-extra.txt
- Reduce ignored flake8 rules and fix a few violations

core/tests/block_test.py

@@ -13,13 +13,18 @@ try:
 except ImportError:
     skip("Can't import the block module, probably hasn't been compiled.")
 
-def my_avgdiff(first, second, limit=768, min_iter=3): # this is so I don't have to re-write every call
+
+def my_avgdiff(
+    first, second, limit=768, min_iter=3
+):  # this is so I don't have to re-write every call
     return avgdiff(first, second, limit, min_iter)
 
+
 BLACK = (0, 0, 0)
-RED = (0xff, 0, 0)
-GREEN = (0, 0xff, 0)
-BLUE = (0, 0, 0xff)
+RED = (0xFF, 0, 0)
+GREEN = (0, 0xFF, 0)
+BLUE = (0, 0, 0xFF)
+
 
 class FakeImage:
     def __init__(self, size, data):
@@ -37,16 +42,20 @@ class FakeImage:
                 pixels.append(pixel)
         return FakeImage((box[2] - box[0], box[3] - box[1]), pixels)
 
+
 def empty():
     return FakeImage((0, 0), [])
 
-def single_pixel(): #one red pixel
-    return FakeImage((1, 1), [(0xff, 0, 0)])
+
+def single_pixel():  # one red pixel
+    return FakeImage((1, 1), [(0xFF, 0, 0)])
+
 
 def four_pixels():
-    pixels = [RED, (0, 0x80, 0xff), (0x80, 0, 0), (0, 0x40, 0x80)]
+    pixels = [RED, (0, 0x80, 0xFF), (0x80, 0, 0), (0, 0x40, 0x80)]
     return FakeImage((2, 2), pixels)
 
+
 class TestCasegetblock:
     def test_single_pixel(self):
         im = single_pixel()
@@ -60,9 +69,9 @@ class TestCasegetblock:
     def test_four_pixels(self):
         im = four_pixels()
         [b] = getblocks2(im, 1)
-        meanred = (0xff + 0x80) // 4
+        meanred = (0xFF + 0x80) // 4
         meangreen = (0x80 + 0x40) // 4
-        meanblue = (0xff + 0x80) // 4
+        meanblue = (0xFF + 0x80) // 4
         eq_((meanred, meangreen, meanblue), b)
 
 
@@ -158,6 +167,7 @@ class TestCasegetblock:
 #         eq_(BLACK, blocks[3])
 #
 
+
 class TestCasegetblocks2:
     def test_empty_image(self):
         im = empty()
@@ -169,9 +179,9 @@ class TestCasegetblocks2:
         blocks = getblocks2(im, 1)
         eq_(1, len(blocks))
         block = blocks[0]
-        meanred = (0xff + 0x80) // 4
+        meanred = (0xFF + 0x80) // 4
         meangreen = (0x80 + 0x40) // 4
-        meanblue = (0xff + 0x80) // 4
+        meanblue = (0xFF + 0x80) // 4
         eq_((meanred, meangreen, meanblue), block)
 
     def test_four_blocks_all_black(self):
@@ -225,25 +235,25 @@ class TestCaseavgdiff:
             my_avgdiff([b, b], [b])
 
     def test_first_arg_is_empty_but_not_second(self):
-        #Don't return 0 (as when the 2 lists are empty), raise!
+        # Don't return 0 (as when the 2 lists are empty), raise!
         b = (0, 0, 0)
         with raises(DifferentBlockCountError):
             my_avgdiff([], [b])
 
     def test_limit(self):
         ref = (0, 0, 0)
-        b1 = (10, 10, 10) #avg 30
-        b2 = (20, 20, 20) #avg 45
-        b3 = (30, 30, 30) #avg 60
+        b1 = (10, 10, 10)  # avg 30
+        b2 = (20, 20, 20)  # avg 45
+        b3 = (30, 30, 30)  # avg 60
         blocks1 = [ref, ref, ref]
         blocks2 = [b1, b2, b3]
         eq_(45, my_avgdiff(blocks1, blocks2, 44))
 
     def test_min_iterations(self):
         ref = (0, 0, 0)
-        b1 = (10, 10, 10) #avg 30
-        b2 = (20, 20, 20) #avg 45
-        b3 = (10, 10, 10) #avg 40
+        b1 = (10, 10, 10)  # avg 30
+        b2 = (20, 20, 20)  # avg 45
+        b3 = (10, 10, 10)  # avg 40
         blocks1 = [ref, ref, ref]
         blocks2 = [b1, b2, b3]
         eq_(40, my_avgdiff(blocks1, blocks2, 45 - 1, 3))