bugfix (biopython#4914)

Co-authored-by: Michiel Jan Laurens de Hoon <mdehoon@Michiels-MacBook-Air.local>
mdehoon · Jan 16, 2025 · 29c931b · 29c931b
1 parent eef8c08
commit 29c931b
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Showing 2 changed files with 4 additions and 2 deletions.
diff --git a/Bio/Align/__init__.py b/Bio/Align/__init__.py
@@ -3580,7 +3580,9 @@ def counts(self):
                     # Don't count seq1 vs seq2 and seq2 vs seq1
                     break
                 for a, b in zip(seq1, seq2):
-                    if a == "-" or b == "-":
+                    if a == "-" and b == "-":
+                        pass
+                    elif a == "-" or b == "-":
                         gaps += 1
                     elif a == b:
                         identities += 1

diff --git a/Doc/Tutorial/chapter_align.rst b/Doc/Tutorial/chapter_align.rst
@@ -606,7 +606,7 @@ customized.
                      0 AGGTTT-- 6
    <BLANKLINE>
    >>> alignment.counts()
-   AlignmentCounts(gaps=8, identities=14, mismatches=2)
+   AlignmentCounts(gaps=6, identities=14, mismatches=2)
 
 Letter frequencies
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