Update clip/simple_tokenizer.py

clip/simple_tokenizer.py

@@ -62,7 +62,7 @@ class SimpleTokenizer(object):
     def __init__(self, bpe_path: str = default_bpe()):
         self.byte_encoder = bytes_to_unicode()
         self.byte_decoder = {v: k for k, v in self.byte_encoder.items()}
-        if not os.system(bpe_path):
+        if not os.path.exists(bpe_path):
             txt_path = bpe_path.replace(".gz", "")
             os.system(f"gzip {txt_path}")
         merges = gzip.open(bpe_path).read().decode("utf-8").split('\n')