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from contextlib import contextmanager
import types
# The idea for this parameter is that we forbid bare assignment
# to torch.backends.<cudnn|mkldnn>.enabled and friends when running our
# test suite, where it's very easy to forget to undo the change
# later.
__allow_nonbracketed_mutation_flag = True
def disable_global_flags():
global __allow_nonbracketed_mutation_flag
__allow_nonbracketed_mutation_flag = False
def flags_frozen():
return not __allow_nonbracketed_mutation_flag
@contextmanager
def __allow_nonbracketed_mutation():
global __allow_nonbracketed_mutation_flag
old = __allow_nonbracketed_mutation_flag
__allow_nonbracketed_mutation_flag = True
try:
yield
finally:
__allow_nonbracketed_mutation_flag = old
class ContextProp(object):
def __init__(self, getter, setter):
self.getter = getter
self.setter = setter
def __get__(self, obj, objtype):
return self.getter()
def __set__(self, obj, val):
if not flags_frozen():
self.setter(val)
else:
raise RuntimeError("not allowed to set %s flags "
"after disable_global_flags; please use flags() context manager instead" % obj.__name__)
class PropModule(types.ModuleType):
def __init__(self, m, name):
super(PropModule, self).__init__(name)
self.m = m
def __getattr__(self, attr):
return self.m.__getattribute__(attr)
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