Update app.py

app.py

@@ -7,7 +7,27 @@ description = "Gradio Demo for MarianMT. To use it, simply add your text, or cli
 article = "<p style='text-align: center'><a href='https://arxiv.org/abs/1804.00344' target='_blank'>Marian: Fast Neural Machine Translation in C++</a></p>"
 
 examples = [
-    ['我叫沃尔夫冈，我住在柏林。']
+    ['我叫沃尔夫冈，我住在柏林。',"opus-mt-zh-en"]
 ]
 
-gr.Interface.load("huggingface/Helsinki-NLP/opus-mt-zh-en", inputs=gr.inputs.Textbox(lines=5, label="Input Text"),title=title,description=description,article=article, examples=examples).launch(enable_queue=True)
+io1 = gr.Interface.load("huggingface/Helsinki-NLP/opus-mt-zh-en")
+
+io2 = gr.Interface.load("huggingface/Helsinki-NLP/opus-mt-en-de")
+
+def inference(text, model):
+    if model == "opus-mt-zh-en":
+        outtext = io1(text)
+    else:
+        outtext = io2(text)
+    return outtext   
+     
+
+gr.Interface(
+    inference, 
+    [gr.inputs.Textbox(label="Input"),gr.inputs.Dropdown(choices=["opus-mt-zh-en","opus-mt-en-de"], type="value", default="opus-mt-zh-en", label="model")
+], 
+    gr.outputs.Textbox(label="Output"),
+    examples=examples,
+    article=article,
+    title=title,
+    description=description).launch(enable_queue=True, cache_examples=True)