meter usage logging implementation

Summary:
Ensures that all meter classes (e.g. precision, accuracy, recall) inheriting from the base class classy_vision/meters/classy_meter.py have their usage logged.
This is done through the log_class_usage function defined in classy_vision/generic/util.py.

Reviewed By: kazhang

Differential Revision: D25680979

fbshipit-source-id: 3b19dda5ff5f5e0c6122b495bf8c600fff681db3

Author: Jimmy Kim

classy_vision/meters/accuracy_meter.py

@@ -25,6 +25,8 @@ def __init__(self, topk):
         args:
             topk: list of int `k` values.
         """
+        super().__init__()
+
         assert isinstance(topk, list), "topk must be a list"
         assert len(topk) > 0, "topk list should have at least one element"
         assert [is_pos_int(x) for x in topk], "each value in topk must be >= 1"

classy_vision/meters/classy_meter.py

@@ -7,6 +7,7 @@
 from typing import Any, Dict, Tuple
 
 import torch
+from classy_vision.generic.util import log_class_usage
 
 
 class ClassyMeter:
@@ -16,6 +17,9 @@ class ClassyMeter:
     This can include meters like  Accuracy, Precision and Recall, etc.
     """
 
+    def __init__(self):
+        log_class_usage("Meter", self.__class__)
+
     @classmethod
     def from_config(cls, config: Dict[str, Any]) -> "ClassyMeter":
         """Instantiates a ClassyMeter using a configuration.

classy_vision/meters/precision_meter.py

@@ -26,6 +26,8 @@ def __init__(self, topk):
         args:
             topk: list of int `k` values.
         """
+        super().__init__()
+
         assert isinstance(topk, list), "topk must be a list"
         assert len(topk) > 0, "topk list should have at least one element"
         assert [is_pos_int(x) for x in topk], "each value in topk must be >= 1"

classy_vision/meters/recall_meter.py

@@ -25,6 +25,8 @@ def __init__(self, topk, target_is_one_hot=True, num_classes=None):
         args:
             topk: list of int `k` values.
         """
+        super().__init__()
+
         assert isinstance(topk, list), "topk must be a list"
         assert len(topk) > 0, "topk list should have at least one element"
         assert [is_pos_int(x) for x in topk], "each value in topk must be >= 1"

classy_vision/meters/video_meter.py

@@ -27,6 +27,7 @@ def __init__(self, clips_per_video_train, clips_per_video_test):
             clips_per_video_train: No. of clips sampled per video at train time
             clips_per_video_test: No. of clips sampled per video at test time
         """
+        super().__init__()
 
         self._clips_per_video_train = clips_per_video_train
         self._clips_per_video_test = clips_per_video_test