Fix traceback not being rendered even with --traceback flag

orthoani/__init__.py

@@ -99,15 +99,15 @@ def _hits(
     args = shlex.split(str(cmd))
     proc = subprocess.run(args, check=True, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
 
-    hits = collections.defaultdict(list)
+    hits = {}
     for record in NCBIXML.parse(io.BytesIO(proc.stdout)):
         if record.alignments:
             nid = length = decimal.Decimal(0)
             for hsp in record.alignments[0].hsps:
                 if hsp.align_length >= 0.35 * blocksize:
                     nid += hsp.identities
                     length += hsp.align_length
-            if length != 0:
+            if length > 0:
                 hits[record.query, record.alignments[0].hit_def] = nid / length
     return hits
 

orthoani/_main.py

@@ -57,7 +57,6 @@ def argument_parser():
 def main(argv=None):
     parser = argument_parser()
     args = parser.parse_args(argv)
-    better_exceptions.hook()
 
     try:
         query = parse(args.query, "fasta")
@@ -70,9 +69,11 @@ def main(argv=None):
         return -signal.SIGINT
 
     except Exception as e:
-        print(e, file=sys.stderr)
-        try:
-            if args.traceback:
-                raise
-        finally:
-            return getattr(e, "errno", 1)
+        if args.traceback: 
+            print(
+                better_exceptions.format_exception(type(e), e, e.__traceback__), 
+                file=sys.stderr
+            )
+        else:
+            print(e, file=sys.stderr)
+        return getattr(e, "errno", 1)