Added skeleton of precision metric to metrics

Author: Johanmkr

utils/metrics/precision.py

@@ -0,0 +1,12 @@
+import torch
+import torch.nn as nn
+
+
+class Precision(nn.Module):
+    def __init__(self, num_classes):
+        super().__init__()
+
+        self.num_classes = num_classes
+
+    def forward(self, y_true, y_pred):
+        pass