Code formatting

Had some issues with running black locally due to version problems.
Now resolved and formatted the test code accordingly :)

Author: CarlAndersson

Diff for: packages/python/plotly/plotly/tests/test_core/test_colors/test_colors.py

@@ -142,17 +142,29 @@ def test_sample_colorscale(self):
 
         # test that sampling a colorscale at the defined points returns the same
         defined_colors = colors.sequential.Inferno
-        sampled_colors = colors.sample_colorscale(defined_colors, len(defined_colors), colortype="rgb")
-        defined_colors_rgb = colors.convert_colors_to_same_type(defined_colors, colortype='rgb')[0]
+        sampled_colors = colors.sample_colorscale(
+            defined_colors, len(defined_colors), colortype="rgb"
+        )
+        defined_colors_rgb = colors.convert_colors_to_same_type(
+            defined_colors, colortype="rgb"
+        )[0]
         self.assertEqual(sampled_colors, defined_colors_rgb)
 
         # test sampling an easy colorscale that goes [red, green, blue]
-        defined_colors = ['rgb(255,0,0)', 'rgb(0,255,0)', 'rgb(0,0,255)']
+        defined_colors = ["rgb(255,0,0)", "rgb(0,255,0)", "rgb(0,0,255)"]
         samplepoints = [0.0, 0.125, 0.25, 0.375, 0.5, 0.625, 0.75, 0.875, 1.0]
         expected_output = [
-            (1.0, 0.0, 0.0), (0.75, 0.25, 0.0), (0.5, 0.5, 0.0),
-            (0.25, 0.75, 0.0), (0.0, 1.0, 0.0), (0.0, 0.75, 0.25),
-            (0.0, 0.5, 0.5), (0.0, 0.25, 0.75), (0.0, 0.0, 1.0)
+            (1.0, 0.0, 0.0),
+            (0.75, 0.25, 0.0),
+            (0.5, 0.5, 0.0),
+            (0.25, 0.75, 0.0),
+            (0.0, 1.0, 0.0),
+            (0.0, 0.75, 0.25),
+            (0.0, 0.5, 0.5),
+            (0.0, 0.25, 0.75),
+            (0.0, 0.0, 1.0),
         ]
-        output = colors.sample_colorscale(defined_colors, samplepoints, colortype="tuple")
+        output = colors.sample_colorscale(
+            defined_colors, samplepoints, colortype="tuple"
+        )
         self.assertEqual(expected_output, output)