Initialized Focal Tversky loss

Author: Aditi-Mhatre

segmentation_models_pytorch/losses/__init__.py

@@ -8,6 +8,7 @@
 from .soft_ce import SoftCrossEntropyLoss
 from .tversky import TverskyLoss
 from .mcc import MCCLoss
+from .focal_tversky import FocalTverskyLoss
 
 __all__ = [
     "BINARY_MODE",
@@ -21,4 +22,5 @@
     "SoftCrossEntropyLoss",
     "TverskyLoss",
     "MCCLoss",
+    "FocalTverskyLoss",
 ]