Update app.py

app.py

@@ -11,11 +11,12 @@ def extract_tables(pdf_file):
     try:
         tables = camelot.read_pdf(pdf_file.name, pages="all")
         df = pd.concat([table.df for table in tables], ignore_index=True)
-        return df
-    except OSError as e:
+        return df, "Ready"
+    except OSError:
         install_ghostscript()
-        return gr.update(label="Ghostscript installed. Please retry.")
+        return None, "Ghostscript installed. Please retry."
 
+## Gradio Interface
 demo = gr.Interface(
     fn=extract_tables,
     inputs=gr.File(label="Upload PDF"),