Allow specifying device to use when training

Closes #139 (closed)

dan/ocr/manager/training.py

@@ -100,11 +100,10 @@ class GenericTrainingManager:
         self.dataset.load_dataloaders()
 
     def init_hardware_config(self):
+        cuda_is_available = torch.cuda.is_available()
+
         # Debug mode
-        if (
-            self.device_params["force"] not in [None, "cuda"]
-            or not torch.cuda.is_available()
-        ):
+        if self.device_params["force"] not in [None, "cuda"] or not cuda_is_available:
             self.device_params["use_ddp"] = False
             self.device_params["use_amp"] = False
 
@@ -125,9 +124,7 @@ class GenericTrainingManager:
             self.launch_ddp()
         else:
             self.device = torch.device(
-                self.device_params["force"] or "cuda"
-                if torch.cuda.is_available()
-                else "cpu"
+                self.device_params["force"] or "cuda" if cuda_is_available else "cpu"
             )
         if self.device == torch.device("cpu"):
             self.params["model"]["device"] = "cpu"