Update Mimic4Dataset.py

Mimic4Dataset.py

@@ -414,7 +414,7 @@ class Mimic4Dataset(datasets.GeneratorBasedBuilder):
         self.config_path = kwargs.pop("config_path",None)
         self.test_size = kwargs.pop("test_size",0.2)
         self.val_size = kwargs.pop("val_size",0.1)
-        if self.encoding != 'onehot' or self.encoding != 'deep' or self.encoding is not None:
+        if self.encoding != 'onehot' or self.encoding != 'deep' or self.encoding != 'raw':
             raise ValueError("Encoding must be either onehot, deep or raw")
         super().__init__(**kwargs)