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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
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