Added method to generate a list of hex color values between a start

color and end color.

i3pystatus/core/util.py

@@ -3,6 +3,7 @@ import functools
 import re
 import socket
 import string
+from colour import Color
 
 
 def lchop(string, prefix):
@@ -423,3 +424,29 @@ def user_open(url_or_command):
         import subprocess
         subprocess.Popen(url_or_command, shell=True)
 
+
+def get_hex_color_range(start_color, end_color, quantity):
+    """
+    Generates a list of quantity Hex colors from start_color to end_color.
+
+    :param start_color: Hex or plain English color for start of range
+    :param end_color: Hex or plain English color for end of range
+    :param quantity: Number of colours to return
+    :return: A list of Hex color values
+    """
+    raw_colors = [c.hex for c in list(Color(start_color).range_to(Color(end_color), quantity))]
+    colors = []
+    for color in raw_colors:
+
+        # i3bar expects the full Hex value but for some colors the colour
+        # module only returns partial values. So we need to convert these colors to the full
+        # Hex value.
+        if len(color) == 4:
+            fixed_color = "#"
+            for c in color[1:]:
+                fixed_color += c * 2
+            colors.append(fixed_color)
+        else:
+            colors.append(color)
+    return colors
+