fix unique name recursion overflow (#367)

archetypal/template/umi_base.py

@@ -501,7 +501,7 @@ def comments(self):
 class UniqueName(str):
     """Attribute unique user-defined names for :class:`UmiBase`."""
 
-    existing = set()
+    existing = {}
 
     def __new__(cls, content):
         """Pick a name. Will increment the name if already used."""
@@ -519,17 +519,11 @@ def create_unique(cls, name):
         if not name:
             return None
         if name not in cls.existing:
-            cls.existing.add(name)
+            cls.existing[name] = 0
             return name
         else:
-            match = re.match(r"^(.*?)(\D*)(\d+)$", name)
-            if match:
-                groups = list(match.groups())
-                pad = len(groups[-1])
-                groups[-1] = int(groups[-1])
-                groups[-1] += 1
-                groups[-1] = str(groups[-1]).zfill(pad)
-                name = "".join(map(str, groups))
-                return cls.create_unique(name)
-            else:
-                return cls.create_unique(name + "_1")
+            current_count = cls.existing[name]
+            new_count = current_count + 1
+            new_name = f"{name}_{str(new_count)}"
+            cls.existing[name] = new_count
+            return new_name

archetypal/umi_template.py

@@ -607,7 +607,7 @@ def to_dict(self):
         # create dict values
         for group_name, group in self:
             # reset unique names for group
-            UniqueName.existing = set()
+            UniqueName.existing = {}
             obj: UmiBase
             for obj in group:
                 try: