WEIGHT_DECAY_BIAS should be unset by default, use None

Reviewed By: newstzpz

Differential Revision: D31284136

fbshipit-source-id: 23603278472d3aa375295efc0d4922f63b296499

Author: ppwwyyxx

detectron2/config/defaults.py

@@ -557,7 +557,7 @@
 # changing these and they exist only to reproduce Detectron v1 training if
 # desired.
 _C.SOLVER.BIAS_LR_FACTOR = 1.0
-_C.SOLVER.WEIGHT_DECAY_BIAS = _C.SOLVER.WEIGHT_DECAY
+_C.SOLVER.WEIGHT_DECAY_BIAS = None   # None means following WEIGHT_DECAY
 
 # Gradient clipping
 _C.SOLVER.CLIP_GRADIENTS = CN({"ENABLED": False})

setup.py

@@ -168,7 +168,7 @@ def get_model_zoo_configs() -> List[str]:
         # choosing the proper pypi package name at https://github.com/skvark/opencv-python
         # The following are pure-python dependencies that should be easily installable
         "termcolor>=1.1",
-        "yacs>=0.1.6",
+        "yacs>=0.1.8",
         "tabulate",
         "cloudpickle",
         "tqdm>4.29.0",