fix path error

Author: graykode

GPT2/encoder.py

@@ -105,9 +105,9 @@ def decode(self, tokens):
         return text
 
 def get_encoder():
-    with open(os.path.join('encoder.json'), 'r') as f:
+    with open('./GPT2/encoder.json', 'r') as f:
         encoder = json.load(f)
-    with open(os.path.join('vocab.bpe'), 'r', encoding="utf-8") as f:
+    with open('./GPT2/vocab.bpe', 'r', encoding="utf-8") as f:
         bpe_data = f.read()
     bpe_merges = [tuple(merge_str.split()) for merge_str in bpe_data.split('\n')[1:-1]]
     return Encoder(