Clearer error message from odd FASTA-m10 files (Issue 3312)

biopython · Nov 10, 2011 · 1a99454 · 1a99454
1 parent b444c77
commit 1a99454
Showing 1 changed file with 3 additions and 0 deletions.
diff --git a/Bio/AlignIO/FastaIO.py b/Bio/AlignIO/FastaIO.py
@@ -103,6 +103,9 @@ def FastaM10Iterator(handle, alphabet = single_letter_alphabet):
     state_ALIGN_CONS = 5
 
     def build_hsp():
+        if not query_tags and not match_tags:
+            raise ValueError("No data for query %r, match %r" \
+                             % (query_id, match_id))
         assert query_tags, query_tags
         assert match_tags, match_tags
         evalue = align_tags.get("fa_expect", None)