


def 				SCREAMING_SNAKE_CASE (     UpperCAmelCase__							):

    """simple docstring"""






    if not isinstance(UpperCAmelCase__   ,UpperCAmelCase__							):
        raise ValueError('double_factorial() only accepts integral values'							)
    if n < 0:
        raise ValueError('double_factorial() not defined for negative values'							)
    return 1 if n <= 1 else n * double_factorial(n - 2							)


if __name__ == "__main__":
       import doctest

       doctest.testmod()




import inspect
import warnings

import torch

from .state import AcceleratorState, GradientState
from .utils import DistributedType, honor_type, is_tpu_available


if is_tpu_available(check_device=False):
							import torch_xla.core.xla_model as xm


def 				SCREAMING_SNAKE_CASE (     UpperCAmelCase__   ,UpperCAmelCase__							):

				"""simple docstring"""






				if isinstance(UpperCAmelCase__   ,(list, tuple)							):
								return honor_type(UpperCAmelCase__   ,(move_to_device(UpperCAmelCase__   ,UpperCAmelCase__							) for t in state)							)
				elif isinstance(UpperCAmelCase__   ,UpperCAmelCase__							):
								return type(UpperCAmelCase__							)({k: move_to_device(UpperCAmelCase__   ,UpperCAmelCase__							) for k, v in state.items()}							)
				elif isinstance(UpperCAmelCase__   ,torch.Tensor							):
								return state.to(UpperCAmelCase__							)
				return state



class    __lowercase  (       torch.optim.Optimizer							):

							"""simple docstring"""


							def __init__(    self				, A_				, A_=True				, A_=None	)->	List[str]:
											_SCREAMING_SNAKE_CASE      = optimizer
											_SCREAMING_SNAKE_CASE      = scaler
											_SCREAMING_SNAKE_CASE      = AcceleratorState()
											_SCREAMING_SNAKE_CASE      = GradientState()
											_SCREAMING_SNAKE_CASE      = device_placement
											_SCREAMING_SNAKE_CASE      = False
											_SCREAMING_SNAKE_CASE      = None

											# Handle device placement
											if device_placement:
															_SCREAMING_SNAKE_CASE      = self.optimizer.state_dict()
															if self.accelerator_state.distributed_type == DistributedType.TPU:
																			xm.send_cpu_data_to_device(A_				, self.accelerator_state.device	)
															else:
																			_SCREAMING_SNAKE_CASE      = move_to_device(A_				, self.accelerator_state.device	)
															self.optimizer.load_state_dict(A_	)





							@property
							def 		__magic_name__			(    self	)->	Tuple:
											return self.optimizer.state





							@state.setter
							def 		__magic_name__			(    self				, A_	)->	str:
											_SCREAMING_SNAKE_CASE      = state





							@property
							def 		__magic_name__			(    self	)->	Optional[Any]:
											return self.optimizer.param_groups





							@param_groups.setter
							def 		__magic_name__			(    self				, A_	)->	Tuple:
											_SCREAMING_SNAKE_CASE      = param_groups





							@property
							def 		__magic_name__			(    self	)->	Any:
											return self.optimizer.defaults





							@defaults.setter
							def 		__magic_name__			(    self				, A_	)->	Dict:
											_SCREAMING_SNAKE_CASE      = defaults





							def 		__magic_name__			(    self				, A_	)->	Any:
											self.optimizer.add_param_group(A_	)





							def 		__magic_name__			(    self				, A_	)->	int:
											if self.accelerator_state.distributed_type == DistributedType.TPU and self.device_placement:
															xm.send_cpu_data_to_device(A_				, self.accelerator_state.device	)
											self.optimizer.load_state_dict(A_	)





							def 		__magic_name__			(    self	)->	List[str]:
											return self.optimizer.state_dict()





							def 		__magic_name__			(    self				, A_=None	)->	Any:
											if self.gradient_state.sync_gradients:
															_SCREAMING_SNAKE_CASE      = 'set_to_none' in inspect.signature(self.optimizer.zero_grad	).parameters
															if accept_arg:
																			if set_to_none is None:
																							_SCREAMING_SNAKE_CASE      = False
																			self.optimizer.zero_grad(set_to_none=A_	)
															else:
																			if set_to_none is not None:
																							raise ValueError('`set_to_none` for Optimizer.zero_grad` is not supported by this optimizer.'	)
																			self.optimizer.zero_grad()





							def 		__magic_name__			(    self				, A_=None	)->	Optional[int]:
											if self.gradient_state.sync_gradients:
															if self.accelerator_state.distributed_type == DistributedType.TPU:
																			_SCREAMING_SNAKE_CASE      = {'closure': closure} if closure is not None else {}
																			xm.optimizer_step(self.optimizer				, optimizer_args=A_	)
															elif self.scaler is not None:
																			_SCREAMING_SNAKE_CASE      = False
																			if self._last_scale is None:
																							# `get_scale` is an async operation requiring full synchronization
																							# on CPU and GPUs before finishing. As a result, we store away
																							# the prior one to reduce the call overhead
																							_SCREAMING_SNAKE_CASE      = self.scaler.get_scale()
																							_SCREAMING_SNAKE_CASE      = True
																			self.scaler.step(self.optimizer				, A_	)
																			self.scaler.update()
																			_SCREAMING_SNAKE_CASE      = self.scaler.get_scale()
																			if not new_scale:
																							# If we reduced the loss scale, it means the optimizer step was skipped because of gradient overflow.
																							_SCREAMING_SNAKE_CASE      = scale_after < self._last_scale
																			_SCREAMING_SNAKE_CASE      = scale_after

															else:
																			self.optimizer.step(A_	)





							def 		__magic_name__			(    self				, A_	)->	Dict:
											for param_group in self.optimizer.param_groups:
															_SCREAMING_SNAKE_CASE      = [parameters_map.get(A_				, A_	) for p in param_group['params']]





							@property
							def 		__magic_name__			(    self	)->	str:
											warnings.warn(
											    'The `is_overflow` property is deprecated and will be removed in version 1.0 of Accelerate use '
											    '`optimizer.step_was_skipped` instead.'				, A_				, )
											return self._is_overflow





							@property
							def 		__magic_name__			(    self	)->	int:
											return self._is_overflow





							def __getstate__(    self	)->	Dict:
											return self.__dict__.copy()





							def __setstate__(    self				, A_	)->	List[str]:
											self.__dict__.update(A_	)
