Fix bug with parsing img when val is no string

utils.py

@@ -94,7 +94,7 @@ def iterate_key_section_content(
     data: dict[str, Section],
     parent_section: str = "",
     parent_keys: list[str] | None = None,
-    level=0,
+    level: int = 0,
 ) -> SectionInfo:
     parent_keys = parent_keys or []
 
@@ -111,12 +111,13 @@ def iterate_key_section_content(
         content = val.content
 
         is_fig = getattr(val, "is_fig", False)
-        img_match = PAT_MD_IMG.match(val.content)
-        if img_match:  # image section found in parsed model card
-            is_fig = True
-            img_title = img_match.groupdict()["image_title"]
-            img_path = img_match.groupdict()["image_path"]
-            content = PlotSection(alt_text=img_title, path=img_path)
+        if isinstance(val.content, str):
+            img_match = PAT_MD_IMG.match(val.content)
+            if img_match:  # image section found in parsed model card
+                is_fig = True
+                img_title = img_match.groupdict()["image_title"]
+                img_path = img_match.groupdict()["image_path"]
+                content = PlotSection(alt_text=img_title, path=img_path)
 
         yield SectionInfo(
             return_key=return_key,