Update encoders.py

Author: sdtblck

encoders.py

@@ -22,6 +22,7 @@ def fetch_encoder(params):
 
 # GPT2Tokenizer and Tokenizer have different ways of fetching token ids
 def encode(encoder, text, gpt=True):
+    result = encoder.encode(text)
     if isinstance(result, list):
         return result
     return result.ids