Update app.py

app.py

@@ -17,12 +17,12 @@ def get_audio(url):
   audio_file = new_file 
   return audio_file
 
-def transcribe(rec=None, file=None, url=None):
+def transcribe(rec=None, file=None, url=""):
     if rec is not None:
         audio = rec
     elif file is not None:
         audio = file
-    elif url is not None:
+    elif url is not "":
         audio = get_audio(url)
     else:
         return "Provide a recording or a file."