Update app.py

app.py

@@ -23,6 +23,8 @@ def load_names_from_url(url):
 # Carregar nomes do arquivo JSON-LD a partir do URL
 names = load_names_from_url('https://huggingface.co/spaces/histlearn/ShowGraph/raw/main/datafile.jsonld')
 
+print("Loaded names:", names)  # Adicionando impressão para depuração
+
 def run_query_and_visualize(qtext, turtle_file):
     # Carrega o arquivo Turtle
     g = rdflib.Graph()
@@ -64,7 +66,10 @@ with gr.Blocks() as demo:
 
     with gr.Column():
         selected_location = gr.Dropdown(choices=names, label="Selecione o Local")
-        query_input = gr.Textbox(label="Consulta SPARQL", value=update_query(names[0]), lines=10)
+        if names:  # Verifica se a lista de nomes não está vazia
+            query_input = gr.Textbox(label="Consulta SPARQL", value=update_query(names[0]), lines=10)
+        else:
+            query_input = gr.Textbox(label="Consulta SPARQL", value="", lines=10)
         turtle_file_input = gr.File(label="Arquivo Turtle")
         run_button = gr.Button("Executar Consulta")