iZh(NdZddlmZddlZddlmZddlmZmZmZm Z m Z m Z m Z m Z mZmZmZmZmZmZmZmZddgZGd deZd d ed e d ed ed ed ze_deedeedeedeedeedeedededededededededededed df$d!Zdeedeedeedeedeedeedededededededededededed df$d"Ze e# d&deedeedeedeedeedeeded$edzdedededededededededed df&d%Zy)'z'Implementation for the NAdam algorithm.)castN)Tensor)_capturable_doc_default_to_fused_or_foreach_differentiable_doc_disable_dynamo_if_unsupported _foreach_doc!_get_capturable_supported_devices_get_scalar_dtype _get_value _maximize_doc _params_doc_stack_if_compiling _to_scalar_use_grad_for_differentiable _view_as_real OptimizerParamsTNAdamnadamceZdZ dddddddedeezdeeefdeded ed ed edzd ed ededdffdZfdZ dZ e ddZ xZ S)rFN)foreachmaximize capturabledifferentiableparamslrbetaseps weight_decaymomentum_decaydecoupled_weight_decayrrrrreturnc t|tr|jdk7r tdd|kstd|d|kstd|d|dcxkrdksntd|dd|dcxkrdksntd |dd|kstd |d|kstd |||||||| || | d } t ||| y) NrzTensor lr must be 1-elementzInvalid learning rate: zInvalid epsilon value: r?z#Invalid beta parameter at index 0: z#Invalid beta parameter at index 1: zInvalid weight_decay value: zInvalid momentum_decay value: ) rrr r!r"r#rrrr) isinstancernumel ValueErrorsuper__init__)selfrrrr r!r"r#rrrrdefaults __class__s K/var/www/html/engine/venv/lib/python3.12/site-packages/torch/optim/nadam.pyr,zNAdam.__init__!s b& !bhhjAo:; ;by6rd;< <cz6se<= =eAh$$B58*MN NeAh$$B58*MN Nl";L>JK Kn$=n=MNO O(,&< $,   *c8t|||jD]z}|jdd|jdd|jdd|jdd|jdd|dD]}|jj |g}t |dk7s/tj|d s_t|d }|dr*tj|t|j ntj|t |d <tj|d r|d }|dr*tj|t|j ntj|t |d <}y) NrFrrrr#rrstepdtypedevicer5 mu_product) r+ __setstate__ param_groups setdefaultstategetlentorch is_tensorfloattensorr r6)r-r<grouppp_statestep_val mu_prod_valr/s r0r9zNAdam.__setstate__Lsn U#&& E   Z /   Y -   \5 1   -u 5   5u =8_ **..B/w<1$ ??76?;#(#9 %\2"LL (0A0CAHH"'h>O>Q!R  !??7<+@A&-l&; %\2"LL +3D3Fqxx"'kARAT!U  -   r1cd}|dD]} | j|tj| z}|j| | jjr t d|j| j|j | } t| dk(r|dr*tjdt| jntjdt | d <|dr*tjdt| jntjd t | d <tj| tj | d<tj| tj | d<|j| d|j| d|j| d |j| d |S)NFrz'NAdam does not support sparse gradientsrrr4r&r7r3r'r8) memory_formatexp_avg exp_avg_sq)gradr? is_complexappend is_sparse RuntimeErrorr<r>zerosr r6rBones zeros_likepreserve_format) r-rCparams_with_gradgradsexp_avgs exp_avg_sqs mu_products state_steps has_complexrDr<s r0 _init_groupzNAdam._init_groupjs x$ 2Avv!u//22  ''*66##&'PQQ QVV$ 1 u:? !. B.?.A!((S"\\#5F5HI&M!. 2->-@R"\\#5F5HI,' (-'7'7)>)>(E)$+0*:*:)>)>+E,'i 01""5#67""5#67""5=1I$ 2Jr1c|jd}|$tj5|}ddd|jD]}g}g}g}g}g}g} t t t t f|d\} } |j||||||| } t|||||| | | |d|d|d|d|d|d|d |d |d | |S#1swYxYw) zPerform a single optimization step. Args: closure (Callable, optional): A closure that reevaluates the model and returns the loss. Nrrr!r"r rr#rrr) beta1beta2rr!r"r rr#rrrr\) _cuda_graph_capture_health_checkr? enable_gradr:rtuplerAr]r) r-closurelossrCrVrWrXrYrZr[r_r`r\s r0r3z NAdam.steps2 --/  ""$ !y !&&& E-/ "$E%'H(*K(*K(*KeUl 3U7^DLE5** K  ;">2$%56%Lz*',-E'Fi( .$%56'% '& P W ! !s C  C)gMb`?)g?g+?g:0yE>rgMbp?FN)__name__ __module__ __qualname__rrArrcboolr,r9r]rr3 __classcell__)r/s@r0rr s"%1 $',)+ $ $)+)+ FN)+UE\" )+  )+  )+)+!%)+)+)+)+)+ )+V<0d"6"6r1a Implements NAdam algorithm. .. math:: \begin{aligned} &\rule{110mm}{0.4pt} \\ &\textbf{input} : \gamma_t \text{ (lr)}, \: \beta_1,\beta_2 \text{ (betas)}, \: \theta_0 \text{ (params)}, \: f(\theta) \text{ (objective)} \\ &\hspace{13mm} \: \lambda \text{ (weight decay)}, \:\psi \text{ (momentum decay)} \\ &\hspace{13mm} \: \textit{decoupled\_weight\_decay}, \:\textit{maximize} \\ &\textbf{initialize} : m_0 \leftarrow 0 \text{ ( first moment)}, v_0 \leftarrow 0 \text{ ( second moment)} \\[-1.ex] &\rule{110mm}{0.4pt} \\ &\textbf{for} \: t=1 \: \textbf{to} \: \ldots \: \textbf{do} \\ &\hspace{5mm}\textbf{if} \: \textit{maximize}: \\ &\hspace{10mm}g_t \leftarrow -\nabla_{\theta} f_t (\theta_{t-1}) \\ &\hspace{5mm}\textbf{else} \\ &\hspace{10mm}g_t \leftarrow \nabla_{\theta} f_t (\theta_{t-1}) \\ &\hspace{5mm} \theta_t \leftarrow \theta_{t-1} \\ &\hspace{5mm} \textbf{if} \: \lambda \neq 0 \\ &\hspace{10mm}\textbf{if} \: \textit{decoupled\_weight\_decay} \\ &\hspace{15mm} \theta_t \leftarrow \theta_{t-1} - \gamma \lambda \theta_{t-1} \\ &\hspace{10mm}\textbf{else} \\ &\hspace{15mm} g_t \leftarrow g_t + \lambda \theta_{t-1} \\ &\hspace{5mm} \mu_t \leftarrow \beta_1 \big(1 - \frac{1}{2} 0.96^{t \psi} \big) \\ &\hspace{5mm} \mu_{t+1} \leftarrow \beta_1 \big(1 - \frac{1}{2} 0.96^{(t+1)\psi}\big)\\ &\hspace{5mm}m_t \leftarrow \beta_1 m_{t-1} + (1 - \beta_1) g_t \\ &\hspace{5mm}v_t \leftarrow \beta_2 v_{t-1} + (1-\beta_2) g^2_t \\ &\hspace{5mm}\widehat{m_t} \leftarrow \mu_{t+1} m_t/(1-\prod_{i=1}^{t+1}\mu_i)\\[-1.ex] & \hspace{11mm} + (1-\mu_t) g_t /(1-\prod_{i=1}^{t} \mu_{i}) \\ &\hspace{5mm}\widehat{v_t} \leftarrow v_t/\big(1-\beta_2^t \big) \\ &\hspace{5mm}\theta_t \leftarrow \theta_t - \gamma \widehat{m_t}/ \big(\sqrt{\widehat{v_t}} + \epsilon \big) \\ &\rule{110mm}{0.4pt} \\[-1.ex] &\bf{return} \: \theta_t \\[-1.ex] &\rule{110mm}{0.4pt} \\[-1.ex] \end{aligned} For further details regarding the algorithm we refer to `Incorporating Nesterov Momentum into Adam`_. z Args: a lr (float, Tensor, optional): learning rate (default: 2e-3) betas (Tuple[float, float], optional): coefficients used for computing running averages of gradient and its square (default: (0.9, 0.999)) eps (float, optional): term added to the denominator to improve numerical stability (default: 1e-8) weight_decay (float, optional): weight decay (L2 penalty) (default: 0) momentum_decay (float, optional): momentum momentum_decay (default: 4e-3) decoupled_weight_decay (bool, optional): whether to decouple the weight decay as in AdamW to obtain NAdamW. If True, the algorithm does not accumulate weight decay in the momentum nor variance. (default: False) z z .. _Incorporating Nesterov Momentum into Adam: https://openreview.net/forum?id=OM0jvwB8jIp57ZJjtNEZ .. _Decoupled Weight Decay Regularization: https://arxiv.org/abs/1711.05101 rrWrXrYrZr[r_r`rr!r"r r#rrrr\r$c tjjs t|}t |D]\}}| s||n|| }||}||}||}||}tj |rTtj |}tj |}tj |}tj |}tjjs}|r{t}|jj|jjcxk(r|jjk(rnn|jj|vstd|d|dz }|r|}n t|}d||zz }| dk7r-| r|jd|| zz n|j|| }|ddd|| zzzz z}|ddd|dz| zzzz z}||z}|j!|d|z |j|j#||d|z |j%|j'}|s|r]|j| }||z}|| d|z zd|z z z}|| |zd|z z z}|j)|||j)||`t||z}|j+| |j)||| d|z zdt|z z |j)||t-t.| |zd|z z  y) NzVIf capturable=True, params, mu_products and state_steps must be on supported devices: .rralphar'?Q?)value)r?jit is_scriptingr enumeraterN view_as_realcompiler is_compilingr r6typeAssertionErrorr mul_addlerp_addcmul_divsqrtaddcdiv_add_rrA)rrWrXrYrZr[r_r`rr!r"r r#rrrr\iparamrMrKrLr8step_tcapturable_supported_devicesr3bias_correction2mumu_nextdenommu_product_nexts r0_single_tensor_nadamrs&( 99 ! ! # ^f%J5'uQxeAhY1+ ^  ^ Q   E "&&u-E%%d+D((1G++J7J~~**,+L+N ( !!Z%6%6%;%;Qv}}?Q?QQLL%%)EE$--I,J!M !  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