Adding liskov support

Author: moderouin

axelrod/strategies/attention.py

@@ -16,7 +16,7 @@
 CLS_TOKEN = 0
 PAD_TOKEN = 1
 
-DEVICES = torch.device("cuda" if torch.cuda.is_available() else "cpu")
+DEVICES = torch.device("cpu")
 
 model_weights = load_attention_model_weights()
 
@@ -329,7 +329,7 @@ def forward(self, input_ids: torch.Tensor) -> torch.Tensor:
         pooled_output = self.pooler(sequence_output)
         return self.action(pooled_output)
 
-    def __eq__(self, other: "PlayerModel") -> bool:
+    def __eq__(self, other: object) -> bool:
         return isinstance(other, PlayerModel)