Merge pull request #8 from roboflow/fix/optional-imports

fix(trackers): optional import bug for deepsort

Author: SkalskiP

trackers/core/deepsort/feature_extractor.py

@@ -6,7 +6,6 @@
 import torch
 import torch.nn as nn
 import torchvision.transforms as transforms
-import validators
 from firerequests import FireRequests
 
 from trackers.utils.torch_utils import parse_device_spec
@@ -106,6 +105,8 @@ def _initialize_model(
         self, model_or_checkpoint_path: Union[str, torch.nn.Module, None]
     ):
         if isinstance(model_or_checkpoint_path, str):
+            import validators
+
             if validators.url(model_or_checkpoint_path):
                 checkpoint_path = FireRequests().download(model_or_checkpoint_path)[0]
                 self._load_model_from_path(checkpoint_path)