Update app.py

app.py

@@ -111,10 +111,12 @@ def process_image(image_input, unit):
 
 
 def main(text_input="", image_input=None, unit=""):
-    if text_input and image_input is None:
+    if text_input != "" and image_input is None:
         return process_text(text_input,unit)
     elif image_input is not None:
         return process_image(image_input,unit)
+    else:
+        gr.Error("请输入内容或者上传图片")
 
 EXAMPLES = [
         ["./docs/estate.jpeg","",],