Adding basic MetricSignature functionality

pose_evaluation/metrics/base.py

@@ -1,11 +1,70 @@
 # pylint: disable=undefined-variable
 from tqdm import tqdm
+from typing import Any, Callable
 
+class Signature:
+    """Represents reproducibility signatures for metrics. Inspired by sacreBLEU
+    """
+    def __init__(self, name:str, args: dict):
+
+        self._abbreviated = {
+            "name":"n",
+            "higher_is_better":"hb"
+        }
+
+        self.signature_info = {
+            "name": name,
+            "higher_is_better": args.get("higher_is_better", None)
+        }
+
+    def update(self, key: str, value: Any):
+        self.signature_info[key] = value
+
+    def update_signature_and_abbr(self, key:str, abbr:str, args:dict):
+        self._abbreviated.update({
+            key: abbr
+        })
+
+        self.signature_info.update({
+            key: args.get(key, None)
+        })
+
+    def format(self, short: bool = False) -> str:
+        pairs = []
+        keys = list(self.signature_info.keys())
+        for name in keys:
+            value = self.signature_info[name]
+            if value is not None:
+                # Check for nested signature objects
+                if hasattr(value, "get_signature"):
+
+                    # Wrap nested signatures in brackets
+                    nested_signature = value.get_signature()
+                    if isinstance(nested_signature, Signature):
+                        nested_signature = nested_signature.format(short=short)
+                    value = f"{{{nested_signature}}}"
+                if isinstance(value, bool):
+                    # Replace True/False with yes/no
+                    value = "yes" if value else "no"
+                if isinstance(value, Callable):
+                    value = value.__name__
+                final_name = self._abbreviated[name] if short else name
+                pairs.append(f"{final_name}:{value}")
+
+        return "|".join(pairs)
+
+    def __str__(self):
+        return self.format()
+
+    def __repr__(self):
+        return self.format()
 
 class BaseMetric[T]:
     """Base class for all metrics."""
+    # Each metric should define its Signature class' name here
+    _SIGNATURE_TYPE = Signature
 
-    def __init__(self, name: str, higher_is_better: bool = True):
+    def __init__(self, name: str, higher_is_better: bool = False):
         self.name = name
         self.higher_is_better = higher_is_better
 
@@ -38,3 +97,7 @@ def score_all(self, hypotheses: list[T], references: list[T], progress_bar=True)
 
     def __str__(self):
         return self.name
+
+    def get_signature(self) -> Signature:
+        return self._SIGNATURE_TYPE(self.__dict__)
+