Annotations in Epub converter

src/util/color_reader.py

@@ -1,5 +1,5 @@
 import re
-
+from typing import Tuple
 from colorsys import hls_to_rgb
 from webcolors import html4_hex_to_names, hex_to_rgb, rgb_to_name, rgb_percent_to_hex, rgb_to_hex, css3_names_to_hex
 
@@ -48,7 +48,7 @@ def hex2color_name(color):
         return closest_name
 
 
-def str2closest_html_color_name(s: str):
+def str2closest_html_color_name(s: str) -> str:
     """ Transform str -> closest color name """
     if 'rgb' in s:
         rgb_str = 'rgba' if ('rgba' in s) else 'rgb'
@@ -82,7 +82,7 @@ def str2closest_html_color_name(s: str):
         return ''
 
 
-def rgba2rgb(r, g, b, alpha):
+def rgba2rgb(r: int, g: int, b: int, alpha: float) -> Tuple[int, int, int]:
     """ Transform rgba -> rgb """
     r_background, g_background, b_background = 255, 255, 255
     r_new = int((1 - alpha) * r_background + alpha * r)
@@ -91,7 +91,7 @@ def rgba2rgb(r, g, b, alpha):
     return r_new, g_new, b_new
 
 
-def str2hex(s: str):
+def str2hex(s: str) -> str:
     """ Transform str -> hex """
     if '#' in s and (len(s) <= 7):
         return s.lower()
@@ -131,7 +131,6 @@ def str2hex(s: str):
 
 
 if __name__ == '__main__':
-
     colors = [
         (75, 0, 130), (255, 0, 255),
         (139, 69, 19), (46, 139, 87),