Deploy app with syntax issue to test on Hugging Face - the error may be environment-specific

app.py

@@ -212,32 +212,38 @@ def _build_db_url(db_name: str, query: str, phase: str | None) -> str:
 
 
 def fetch_specific_db(db_name, formula):
+    # Validate inputs
     if db_name not in DB_TABS:
         return "Invalid database.", None, None
+
+    # Get configuration
     config = DB_TABS[db_name]
     url = f"https://webbook.nist.gov/cgi/cbook.cgi?Name={quote_plus(formula)}&Units=SI&{config['param']}"
+
+    # Fetch and parse data
     try:
-        response = requests.get(url)
+        response = requests.get(url, timeout=20)
+        response.raise_for_status()
         soup = BeautifulSoup(response.text, 'html.parser')
 
-        # Generic table extraction
+        # Extract tables
         tables = soup.find_all('table')
-    df = None
-    if tables:
+        df = None
+        if tables:
             df = pd.read_html(StringIO(str(tables[0])))[0]
 
-        # Fallback: Links for spectra/structures
+        # Extract download links
         links = [a['href'] for a in soup.find_all('a', href=True) if any(ext in a['href'] for ext in ['.pdf', '.sd', '.jdx'])]
         link_text = f"Download links: {links}" if links else ""
 
-        # Markdown output with summary and data
+        # Format output
         md_content = f"### {db_name}\n{config['summary']}\n\n**Query:** {formula}\n\n{link_text}\n\n**Extracted Data:**"
         if df is not None:
             md_content += "\n" + df.to_markdown(index=False)
         else:
             md_content += "\nNo tabular data found."
 
-        return md_content, df, None  # Return MD, DataFrame (for viz), Plot (None for now; extend for spectra)
+        return md_content, df, None
 
     except Exception as e:
         return f"Error fetching {db_name}: {e}", None, None