Fix an issue where translation would fail if the threads value was not provided

pdf2zh/gui.py

@@ -187,6 +187,11 @@ def translate_file(
     def progress_bar(t: tqdm.tqdm):
         progress(t.n / t.total, desc="Translating...")
 
+    try:
+        threads = int(threads)
+    except ValueError:
+        threads = 1
+
     param = {
         "files": [str(file_raw)],
         "pages": selected_page,
@@ -194,7 +199,7 @@ def translate_file(
         "lang_out": lang_to,
         "service": f"{translator.name}",
         "output": output,
-        "thread": int(threads),
+        "thread": threads,
         "callback": progress_bar,
         "cancellation_event": cancellation_event_map[session_id],
         "envs": _envs,
@@ -341,7 +346,9 @@ with gr.Blocks(
 
             with gr.Accordion("Open for More Experimental Options!", open=False):
                 gr.Markdown("#### Experimental")
-                threads = gr.Textbox(label="number of threads", interactive=True)
+                threads = gr.Textbox(
+                    label="number of threads", interactive=True, value="1"
+                )
                 prompt = gr.Textbox(
                     label="Custom Prompt for llm", interactive=True, visible=False
                 )