Fix coo_map when only one match from regex pattern (#525)

Co-authored-by: Martin Durant <martin.durant@alumni.utoronto.ca>
fsspec · Nov 22, 2024 · 56ef473 · 56ef473
1 parent ccf431b
commit 56ef473
Showing 1 changed file with 5 additions and 1 deletion.
diff --git a/kerchunk/combine.py b/kerchunk/combine.py
@@ -304,7 +304,11 @@ def _get_value(self, index, z, var, fn=None):
         elif isinstance(selector, list):
             o = selector[index]
         elif isinstance(selector, re.Pattern):
-            o = selector.search(fn).groups()[0]
+            regex_groups_o = selector.search(fn).groups()
+            if len(regex_groups_o) == 0:
+                o = selector.search(fn).group()
+            else:
+                o = regex_groups_o[0]
         elif not isinstance(selector, str):
             # constant, should be int or float
             o = selector