catch parse error -> question if it's a valid LCA DB

sourmash-bio · Feb 19, 2018 · aae3c49 · aae3c49
1 parent 774856f
commit aae3c49
Showing 1 changed file with 4 additions and 1 deletion.
diff --git a/sourmash_lib/lca/lca_utils.py b/sourmash_lib/lca/lca_utils.py
@@ -138,7 +138,10 @@ def load(self, db_name):
             xopen = gzip.open
 
         with xopen(db_name, 'rt') as fp:
-            load_d = json.load(fp)
+            try:
+                load_d = json.load(fp)
+            except json.decoder.JSONDecodeError:
+                raise ValueError("cannot parse database file '{}'; is it a valid LCA db?".format(db_name))
             version = load_d['version']
             assert version == '1.0'