Fix Line._combine_diacritics(): the first 5 glyphs were not examined.

pixelocr/page.py

@@ -21,7 +21,7 @@ import numpy as np
 from scipy import ndimage
 from scipy.ndimage import filters
 
-from .utils import cached_property, collect_iterable, pairwise
+from .utils import cached_property, collect_iterable, pairwise, neighbourhood
 from .image import Image, combine
 
 
@@ -145,7 +145,7 @@ class Line(PageObject):
             for i, glyph in enumerate(glyphs):
                 if glyph.is_body():
                     continue
-                neighbours = glyphs[i - 5: i] + glyphs[i + 1: i + 6]
+                neighbours = neighbourhood(glyphs, i, 5)
                 body = max(neighbours, key=lambda neighbour: neighbour.detect_diacritic(glyph))
                 if body.detect_diacritic(glyph):
                     diacritics[body].append(glyph)

pixelocr/utils.py

@@ -44,3 +44,11 @@ def pairwise(iterable):
     a, b = itertools.tee(iterable)
     next(b, None)
     return itertools.zip_longest(a, b)
+
+
+def neighbourhood(lst, index, window=5):
+    """Return adjacent list items."""
+
+    before = lst[:index]
+    after = lst[index + 1:]
+    return before[-window:] + after[:window]