pytorch/caffe2/python/helpers/arg_scope.py
Yiming Wu fa261cdafb arg_scope for model_helper
Summary:
arg_scope module for model_helpers.

Some coding example with it:

  with model_helpers.arg_scope([model_helpers.FC], kwargs):
              model_helpers.FC(model, "x", "out_1", n, n)

  with model_helpers.arg_scope([myhelper], n=-3):
              with model_helpers.arg_scope([myhelper], n=-2):
                  with model_helpers.arg_scope([myhelper], n=n):
                      res = model_helpers.myhelper(None)

  with model_helpers.arg_scope([myhelper], n=-3), \
          model_helpers.arg_scope([myhelper], n=-2), \
          model_helpers.arg_scope([myhelper], n=n):
                  res = model_helpers.myhelper(None)

Reviewed By: salexspb

Differential Revision: D4837180

fbshipit-source-id: 2cbd81681779d6cd1e61ee189edcc1cf3bb07d15
2017-04-24 15:52:25 -07:00

36 lines
1.2 KiB
Python

from __future__ import absolute_import
from __future__ import division
from __future__ import print_function
import contextlib
import copy
import threading
_threadlocal_scope = threading.local()
@contextlib.contextmanager
def arg_scope(single_helper_or_list, **kwargs):
global _threadlocal_scope
if not isinstance(single_helper_or_list, list):
assert callable(single_helper_or_list), \
"arg_scope is only supporting single or a list of helper functions."
single_helper_or_list = [single_helper_or_list]
old_scope = copy.deepcopy(get_current_scope())
for helper in single_helper_or_list:
assert callable(helper), \
"arg_scope is only supporting a list of callable helper functions."
helper_key = helper.__name__
if helper_key not in old_scope:
_threadlocal_scope.current_scope[helper_key] = {}
_threadlocal_scope.current_scope[helper_key].update(kwargs)
yield
_threadlocal_scope.current_scope = old_scope
def get_current_scope():
global _threadlocal_scope
if not hasattr(_threadlocal_scope, "current_scope"):
_threadlocal_scope.current_scope = {}
return _threadlocal_scope.current_scope