"""simple docstring"""




from copy import deepcopy

import torch
import torch.nn.functional as F
from torch.optim import AdamW
from torch.optim.lr_scheduler import LambdaLR
from torch.utils.data import DataLoader

from accelerate.accelerator import Accelerator
from accelerate.state import GradientState
from accelerate.test_utils import RegressionDataset, RegressionModel
from accelerate.utils import DistributedType, is_torch_version, set_seed






def      UpperCAmelCase    (		UpperCamelCase__				,			UpperCamelCase__				,			UpperCamelCase__				,			UpperCamelCase__ ):






							"""simple docstring"""





							for param, grad_param in zip(model_a.parameters()				,			model_b.parameters() ):
														if not param.requires_grad:
																					continue
														if not did_step:
																					# Grads should not be in sync
																					assert (
																					    torch.allclose(param.grad				,			grad_param.grad ) is False
																					), F'''Gradients in sync when they should not be at iteration {iteration}:\nmodel_a grad ({param.grad}) == model_b grad ({grad_param.grad})'''
														else:
																					# Grads should be in sync
																					assert (
																					    torch.allclose(param.grad				,			grad_param.grad ) is True
																					), F'''Gradients not in sync when they should be at iteration {iteration}:\nmodel_a grad ({param.grad}) != model_b grad ({grad_param.grad})'''






def      UpperCAmelCase    (		UpperCamelCase__				,			UpperCamelCase__				,			UpperCamelCase__				,			UpperCamelCase__				,			UpperCamelCase__=True ):






							"""simple docstring"""





							model.train()
							A__		   =							model(UpperCamelCase__ )
							A__		   =							F.mse_loss(UpperCamelCase__				,			target.to(output.device ) )
							if not do_backward:
														loss /= accelerator.gradient_accumulation_steps
														loss.backward()
							else:
														accelerator.backward(UpperCamelCase__ )






def      UpperCAmelCase    (		UpperCamelCase__				,			UpperCamelCase__=False ):






							"""simple docstring"""





							set_seed(42 )
							A__		   =							RegressionModel()
							A__		   =							deepcopy(UpperCamelCase__ )
							A__		   =							RegressionDataset(length=80 )
							A__		   =							DataLoader(UpperCamelCase__				,			batch_size=16 )
							model.to(accelerator.device )
							if sched:
														A__		   =							AdamW(params=model.parameters()				,			lr=1E-3 )
														A__		   =							AdamW(params=ddp_model.parameters()				,			lr=1E-3 )
														A__		   =							LambdaLR(UpperCamelCase__				,			lr_lambda=lambda UpperCamelCase__ : epoch**0.6_5 )
														A__		   =							LambdaLR(UpperCamelCase__				,			lr_lambda=lambda UpperCamelCase__ : epoch**0.6_5 )
							# Make a copy of `model`
							if sched:
														A__   ,     A__   ,     A__   ,     A__		   =							accelerator.prepare(UpperCamelCase__				,			UpperCamelCase__				,			UpperCamelCase__				,			UpperCamelCase__ )
							else:
														A__   ,     A__		   =							accelerator.prepare(UpperCamelCase__				,			UpperCamelCase__ )
							if sched:
														return (model, opt, sched, dataloader, ddp_model, ddp_opt, ddp_sched)
							return model, ddp_model, dataloader






def      UpperCAmelCase    (		UpperCamelCase__ ):






							"""simple docstring"""





							A__   ,     A__   ,     A__		   =							get_training_setup(UpperCamelCase__ )
							# Use a single batch
							A__   ,     A__		   =							next(iter(UpperCamelCase__ ) ).values()
							for iteration in range(3 ):
														# Gather the distributed inputs and targs for the base model
														A__   ,     A__		   =							accelerator.gather((ddp_input, ddp_target) )
														A__   ,     A__		   =							input.to(accelerator.device ), target.to(accelerator.device )
														# Perform our initial ground truth step in non "DDP"
														step_model(UpperCamelCase__				,			UpperCamelCase__				,			UpperCamelCase__				,			UpperCamelCase__ )
														# Do "gradient accumulation" (noop)
														if iteration % 2 == 0:
																					# Accumulate grads locally
																					with accelerator.no_sync(UpperCamelCase__ ):
																												step_model(UpperCamelCase__				,			UpperCamelCase__				,			UpperCamelCase__				,			UpperCamelCase__ )
														else:
																					# Sync grads
																					step_model(UpperCamelCase__				,			UpperCamelCase__				,			UpperCamelCase__				,			UpperCamelCase__ )

														# Since `no_sync` is a noop, `ddp_model` and `model` grads should always be in sync
														check_model_parameters(UpperCamelCase__				,			UpperCamelCase__				,			UpperCamelCase__				,			UpperCamelCase__ )
														for param, ddp_param in zip(model.parameters()				,			ddp_model.parameters() ):
																					if not param.requires_grad:
																												continue
																					assert torch.allclose(
																					    param.grad				,			ddp_param.grad ), F'''Gradients not in sync when they should be:\nModel grad ({param.grad}) != DDP grad ({ddp_param.grad})'''

														# Shuffle ddp_input on each iteration
														torch.manual_seed(1_337 + iteration )
														A__		   =							ddp_input[torch.randperm(len(UpperCamelCase__ ) )]






def      UpperCAmelCase    (		UpperCamelCase__ ):






							"""simple docstring"""





							A__   ,     A__   ,     A__		   =							get_training_setup(UpperCamelCase__ )
							# Use a single batch
							A__   ,     A__		   =							next(iter(UpperCamelCase__ ) ).values()
							for iteration in range(3 ):
														# Gather the distributed inputs and targs for the base model
														A__   ,     A__		   =							accelerator.gather((ddp_input, ddp_target) )
														A__   ,     A__		   =							input.to(accelerator.device ), target.to(accelerator.device )
														# Perform our initial ground truth step in non "DDP"
														step_model(UpperCamelCase__				,			UpperCamelCase__				,			UpperCamelCase__				,			UpperCamelCase__ )
														# Do "gradient accumulation" (noop)
														if iteration % 2 == 0:
																					# Accumulate grads locally
																					with accelerator.no_sync(UpperCamelCase__ ):
																												step_model(UpperCamelCase__				,			UpperCamelCase__				,			UpperCamelCase__				,			UpperCamelCase__ )
														else:
																					# Sync grads
																					step_model(UpperCamelCase__				,			UpperCamelCase__				,			UpperCamelCase__				,			UpperCamelCase__ )

														# DDP model and model should only be in sync when not (iteration % 2 == 0)
														for param, ddp_param in zip(model.parameters()				,			ddp_model.parameters() ):
																					if not param.requires_grad:
																												continue
																					if iteration % 2 == 0:
																												# Grads should not be in sync
																												assert (
																												    torch.allclose(param.grad				,			ddp_param.grad ) is False
																												), F'''Gradients in sync when they should not be:\nModel grad ({param.grad}) == DDP grad ({ddp_param.grad})'''
																					else:
																												# Grads should be in sync
																												assert (
																												    torch.allclose(param.grad				,			ddp_param.grad ) is True
																												), F'''Gradients not in sync when they should be:\nModel grad ({param.grad}) != DDP grad ({ddp_param.grad})'''

        # Shuffle ddp_input on each iteration
														torch.manual_seed(1_337 + iteration )
														A__		   =							ddp_input[torch.randperm(len(UpperCamelCase__ ) )]






def      UpperCAmelCase    (		UpperCamelCase__=False				,			UpperCamelCase__=False ):






							"""simple docstring"""





							A__		   =							Accelerator(
							    split_batches=UpperCamelCase__				,			dispatch_batches=UpperCamelCase__				,			gradient_accumulation_steps=2 )
							# Test that context manager behaves properly
							A__   ,     A__   ,     A__		   =							get_training_setup(UpperCamelCase__ )
							for iteration, batch in enumerate(UpperCamelCase__ ):
														A__   ,     A__		   =							batch.values()
														# Gather the distributed inputs and targs for the base model
														A__   ,     A__		   =							accelerator.gather((ddp_input, ddp_target) )
														A__   ,     A__		   =							input.to(accelerator.device ), target.to(accelerator.device )
														# Perform our initial ground truth step in non "DDP"
														step_model(UpperCamelCase__				,			UpperCamelCase__				,			UpperCamelCase__				,			UpperCamelCase__				,			UpperCamelCase__ )
														# Do "gradient accumulation" (noop)
														with accelerator.accumulate(UpperCamelCase__ ):
																					step_model(UpperCamelCase__				,			UpperCamelCase__				,			UpperCamelCase__				,			UpperCamelCase__ )

														# DDP model and model should only be in sync when not (iteration % 2 == 0)
														for param, ddp_param in zip(model.parameters()				,			ddp_model.parameters() ):
																					if not param.requires_grad:
																												continue
																					if ((iteration + 1) % 2 == 0) or (iteration == len(UpperCamelCase__ ) - 1):
																												# Grads should be in sync
																												assert (
																												    torch.allclose(param.grad				,			ddp_param.grad ) is True
																												), F'''Gradients not in sync when they should be at iteration {iteration}:\nModel grad ({param.grad}) != DDP grad ({ddp_param.grad})'''
																					else:
																												# Grads should not be in sync
																												assert (
																												    torch.allclose(param.grad				,			ddp_param.grad ) is False
																												), F'''Gradients in sync when they should not be at iteration {iteration}:\nModel grad ({param.grad}) == DDP grad ({ddp_param.grad})'''

        # Shuffle ddp_input on each iteration
														torch.manual_seed(1_337 + iteration )
														A__		   =							ddp_input[torch.randperm(len(UpperCamelCase__ ) )]
							GradientState._reset_state()






def      UpperCAmelCase    (		UpperCamelCase__=False				,			UpperCamelCase__=False ):






							"""simple docstring"""





							A__		   =							Accelerator(
							    split_batches=UpperCamelCase__				,			dispatch_batches=UpperCamelCase__				,			gradient_accumulation_steps=2 )
							# Test that context manager behaves properly
							A__   ,     A__   ,     A__   ,     A__   ,     A__   ,     A__   ,     A__		   =							get_training_setup(UpperCamelCase__				,			UpperCamelCase__ )
							for iteration, batch in enumerate(UpperCamelCase__ ):
														A__   ,     A__		   =							batch.values()
														# Gather the distributed inputs and targs for the base model
														A__   ,     A__		   =							accelerator.gather((ddp_input, ddp_target) )
														A__   ,     A__		   =							input.to(accelerator.device ), target.to(accelerator.device )
														# Perform our initial ground truth step in non "DDP"
														model.train()
														ddp_model.train()
														step_model(UpperCamelCase__				,			UpperCamelCase__				,			UpperCamelCase__				,			UpperCamelCase__				,			UpperCamelCase__ )
														opt.step()

														if ((iteration + 1) % 2 == 0) or ((iteration + 1) == len(UpperCamelCase__ )):
																					if split_batches:
																												sched.step()
																					else:
																												for _ in range(accelerator.num_processes ):
																																			sched.step()
														opt.zero_grad()
														# Perform gradient accumulation under wrapper
														with accelerator.accumulate(UpperCamelCase__ ):
																					step_model(UpperCamelCase__				,			UpperCamelCase__				,			UpperCamelCase__				,			UpperCamelCase__ )
																					ddp_opt.step()
																					ddp_sched.step()
																					ddp_opt.zero_grad()

														# Learning rates should be the same
														assert (
														    opt.param_groups[0]["lr"] == ddp_opt.param_groups[0]["lr"]
														), F'''Learning rates found in each optimizer did not align\nopt: {opt.param_groups[0]["lr"]}\nDDP opt: {ddp_opt.param_groups[0]["lr"]}\n'''
														A__		   =							(((iteration + 1) % 2) == 0) or ((iteration + 1) == len(UpperCamelCase__ ))
														if accelerator.num_processes > 1:
																					check_model_parameters(UpperCamelCase__				,			UpperCamelCase__				,			UpperCamelCase__				,			UpperCamelCase__ )
														# Shuffle ddp_input on each iteration
														torch.manual_seed(1_337 + iteration )
							GradientState._reset_state()






def      UpperCAmelCase    (		):






							"""simple docstring"""





							A__		   =							Accelerator()

							A__		   =							RegressionDataset(length=80 )
							A__		   =							DataLoader(UpperCamelCase__				,			batch_size=16 )
							A__		   =							RegressionDataset(length=96 )
							A__		   =							DataLoader(UpperCamelCase__				,			batch_size=16 )
							A__   ,     A__		   =							accelerator.prepare(UpperCamelCase__				,			UpperCamelCase__ )
							assert accelerator.gradient_state.active_dataloader is None
							for iteration, _ in enumerate(UpperCamelCase__ ):
														assert id(accelerator.gradient_state.active_dataloader ) == id(UpperCamelCase__ )
														if iteration < len(UpperCamelCase__ ) - 1:
																					assert not accelerator.gradient_state.end_of_dataloader
																					if iteration == 1:
																												for batch_num, _ in enumerate(UpperCamelCase__ ):
																																			assert id(accelerator.gradient_state.active_dataloader ) == id(UpperCamelCase__ )
																																			if batch_num < len(UpperCamelCase__ ) - 1:
																																										assert not accelerator.gradient_state.end_of_dataloader
																																			else:
																																										assert accelerator.gradient_state.end_of_dataloader
														else:
																					assert accelerator.gradient_state.end_of_dataloader
							assert accelerator.gradient_state.active_dataloader is None






def      UpperCAmelCase    (		):






							"""simple docstring"""





							A__		   =							Accelerator()
							A__		   =							accelerator.state
							if state.local_process_index == 0:
														print('**Test `accumulate` gradient accumulation with dataloader break**' )
							test_dataloader_break()
							if state.distributed_type == DistributedType.NO:
														if state.local_process_index == 0:
																					print('**Test NOOP `no_sync` context manager**' )
														test_noop_sync(UpperCamelCase__ )
							if state.distributed_type in (DistributedType.MULTI_GPU, DistributedType.MULTI_CPU):
														if state.local_process_index == 0:
																					print('**Test Distributed `no_sync` context manager**' )
														test_distributed_sync(UpperCamelCase__ )
							if state.distributed_type == DistributedType.MULTI_GPU:
														for split_batch in [True, False]:
																					for dispatch_batches in [True, False]:
																												if state.local_process_index == 0:
																																			print(
																																			    '**Test `accumulate` gradient accumulation, '				,			F'''`split_batches={split_batch}` and `dispatch_batches={dispatch_batches}`**'''				,			)
																												test_gradient_accumulation(UpperCamelCase__				,			UpperCamelCase__ )

    # Currently will break on torch 2.0 +, need to investigate why
							if is_torch_version('<'				,			'2.0' ) or state.distributed_type == DistributedType.NO:
														if state.local_process_index == 0:
																					print(
																					    '**Test `accumulate` gradient accumulation with optimizer and scheduler, '				,			'`split_batches=False`, `dispatch_batches=False`**'				,			)
														test_gradient_accumulation_with_opt_and_scheduler()
														if state.distributed_type == DistributedType.MULTI_GPU:
																					for split_batch in [True, False]:
																												for dispatch_batches in [True, False]:
																																			if not split_batch and not dispatch_batches:
																																										continue
																																			if state.local_process_index == 0:
																																										print(
																																										    '**Test `accumulate` gradient accumulation with optimizer and scheduler, '				,			F'''`split_batches={split_batch}` and `dispatch_batches={dispatch_batches}`**'''				,			)
																																			test_gradient_accumulation_with_opt_and_scheduler(UpperCamelCase__				,			UpperCamelCase__ )






def      UpperCAmelCase    (		UpperCamelCase__ ):






							"""simple docstring"""





							main()


if __name__ == "__main__":
				main()






"""simple docstring"""




from dataclasses import dataclass
from typing import Optional

import numpy as np
import torch
import torch.nn as nn

from ..utils import BaseOutput, is_torch_version, randn_tensor
from .attention_processor import SpatialNorm
from .unet_ad_blocks import UNetMidBlockaD, get_down_block, get_up_block
@dataclass
class 			UpperCamelCase__(	__A       ):
						lowerCAmelCase__     :  torch.FloatTensor






class 			UpperCamelCase__(	nn.Module       ):





						def __init__(				self						,__UpperCAmelCase=3						,__UpperCAmelCase=3						,__UpperCAmelCase=("DownEncoderBlock2D",)						,__UpperCAmelCase=(64,)						,__UpperCAmelCase=2						,__UpperCAmelCase=32						,__UpperCAmelCase="silu"						,__UpperCAmelCase=True						,)    -> Union[str, Any]:
													super().__init__()
													A__		   =							layers_per_block

													A__		   =							torch.nn.Convad(
													    __UpperCAmelCase						,block_out_channels[0]						,kernel_size=3						,stride=1						,padding=1						,)

													A__		   =							None
													A__		   =							nn.ModuleList([]   )

													# down
													A__		   =							block_out_channels[0]
													for i, down_block_type in enumerate(__UpperCAmelCase   ):
																				A__		   =							output_channel
																				A__		   =							block_out_channels[i]
																				A__		   =							i == len(__UpperCAmelCase   ) - 1

																				A__		   =							get_down_block(
																				    __UpperCAmelCase						,num_layers=self.layers_per_block						,in_channels=__UpperCAmelCase						,out_channels=__UpperCAmelCase						,add_downsample=not is_final_block						,resnet_eps=1e-6						,downsample_padding=0						,resnet_act_fn=__UpperCAmelCase						,resnet_groups=__UpperCAmelCase						,attention_head_dim=__UpperCAmelCase						,temb_channels=__UpperCAmelCase						,)
																				self.down_blocks.append(__UpperCAmelCase   )

													# mid
													A__		   =							UNetMidBlockaD(
													    in_channels=block_out_channels[-1]						,resnet_eps=1e-6						,resnet_act_fn=__UpperCAmelCase						,output_scale_factor=1						,resnet_time_scale_shift='default'						,attention_head_dim=block_out_channels[-1]						,resnet_groups=__UpperCAmelCase						,temb_channels=__UpperCAmelCase						,)

													# out
													A__		   =							nn.GroupNorm(num_channels=block_out_channels[-1]						,num_groups=__UpperCAmelCase						,eps=1e-6   )
													A__		   =							nn.SiLU()

													A__		   =							2 * out_channels if double_z else out_channels
													A__		   =							nn.Convad(block_out_channels[-1]						,__UpperCAmelCase						,3						,padding=1   )

													A__		   =							False





						def  snake_case__		(				self						,__UpperCAmelCase   )    -> Optional[int]:
													A__		   =							x
													A__		   =							self.conv_in(__UpperCAmelCase   )

													if self.training and self.gradient_checkpointing:

																				def create_custom_forward(__UpperCAmelCase   ):
																											def custom_forward(*__UpperCAmelCase   ):
																																		return module(*__UpperCAmelCase   )

																											return custom_forward

																				# down
																				if is_torch_version('>='						,'1.11.0'   ):
																											for down_block in self.down_blocks:
																																		A__		   =							torch.utils.checkpoint.checkpoint(
																																		    create_custom_forward(__UpperCAmelCase   )						,__UpperCAmelCase						,use_reentrant=__UpperCAmelCase   )
																											# middle
																											A__		   =							torch.utils.checkpoint.checkpoint(
																											    create_custom_forward(self.mid_block   )						,__UpperCAmelCase						,use_reentrant=__UpperCAmelCase   )
																				else:
																											for down_block in self.down_blocks:
																																		A__		   =							torch.utils.checkpoint.checkpoint(create_custom_forward(__UpperCAmelCase   )						,__UpperCAmelCase   )
																											# middle
																											A__		   =							torch.utils.checkpoint.checkpoint(create_custom_forward(self.mid_block   )						,__UpperCAmelCase   )

													else:
																				# down
																				for down_block in self.down_blocks:
																											A__		   =							down_block(__UpperCAmelCase   )

																				# middle
																				A__		   =							self.mid_block(__UpperCAmelCase   )

													# post-process
													A__		   =							self.conv_norm_out(__UpperCAmelCase   )
													A__		   =							self.conv_act(__UpperCAmelCase   )
													A__		   =							self.conv_out(__UpperCAmelCase   )

													return sample






class 			UpperCamelCase__(	nn.Module       ):





						def __init__(				self						,__UpperCAmelCase=3						,__UpperCAmelCase=3						,__UpperCAmelCase=("UpDecoderBlock2D",)						,__UpperCAmelCase=(64,)						,__UpperCAmelCase=2						,__UpperCAmelCase=32						,__UpperCAmelCase="silu"						,__UpperCAmelCase="group"						,)    -> Any:
													super().__init__()
													A__		   =							layers_per_block

													A__		   =							nn.Convad(
													    __UpperCAmelCase						,block_out_channels[-1]						,kernel_size=3						,stride=1						,padding=1						,)

													A__		   =							None
													A__		   =							nn.ModuleList([]   )

													A__		   =							in_channels if norm_type == 'spatial' else None

													# mid
													A__		   =							UNetMidBlockaD(
													    in_channels=block_out_channels[-1]						,resnet_eps=1e-6						,resnet_act_fn=__UpperCAmelCase						,output_scale_factor=1						,resnet_time_scale_shift='default' if norm_type == 'group' else norm_type						,attention_head_dim=block_out_channels[-1]						,resnet_groups=__UpperCAmelCase						,temb_channels=__UpperCAmelCase						,)

													# up
													A__		   =							list(reversed(__UpperCAmelCase   )   )
													A__		   =							reversed_block_out_channels[0]
													for i, up_block_type in enumerate(__UpperCAmelCase   ):
																				A__		   =							output_channel
																				A__		   =							reversed_block_out_channels[i]

																				A__		   =							i == len(__UpperCAmelCase   ) - 1

																				A__		   =							get_up_block(
																				    __UpperCAmelCase						,num_layers=self.layers_per_block + 1						,in_channels=__UpperCAmelCase						,out_channels=__UpperCAmelCase						,prev_output_channel=__UpperCAmelCase						,add_upsample=not is_final_block						,resnet_eps=1e-6						,resnet_act_fn=__UpperCAmelCase						,resnet_groups=__UpperCAmelCase						,attention_head_dim=__UpperCAmelCase						,temb_channels=__UpperCAmelCase						,resnet_time_scale_shift=__UpperCAmelCase						,)
																				self.up_blocks.append(__UpperCAmelCase   )
																				A__		   =							output_channel

													# out
													if norm_type == "spatial":
																				A__		   =							SpatialNorm(block_out_channels[0]						,__UpperCAmelCase   )
													else:
																				A__		   =							nn.GroupNorm(num_channels=block_out_channels[0]						,num_groups=__UpperCAmelCase						,eps=1e-6   )
													A__		   =							nn.SiLU()
													A__		   =							nn.Convad(block_out_channels[0]						,__UpperCAmelCase						,3						,padding=1   )

													A__		   =							False





						def  snake_case__		(				self						,__UpperCAmelCase						,__UpperCAmelCase=None   )    -> Dict:
													A__		   =							z
													A__		   =							self.conv_in(__UpperCAmelCase   )

													A__		   =							next(iter(self.up_blocks.parameters()   )   ).dtype
													if self.training and self.gradient_checkpointing:

																				def create_custom_forward(__UpperCAmelCase   ):
																											def custom_forward(*__UpperCAmelCase   ):
																																		return module(*__UpperCAmelCase   )

																											return custom_forward

																				if is_torch_version('>='						,'1.11.0'   ):
																											# middle
																											A__		   =							torch.utils.checkpoint.checkpoint(
																											    create_custom_forward(self.mid_block   )						,__UpperCAmelCase						,__UpperCAmelCase						,use_reentrant=__UpperCAmelCase   )
																											A__		   =							sample.to(__UpperCAmelCase   )

																											# up
																											for up_block in self.up_blocks:
																																		A__		   =							torch.utils.checkpoint.checkpoint(
																																		    create_custom_forward(__UpperCAmelCase   )						,__UpperCAmelCase						,__UpperCAmelCase						,use_reentrant=__UpperCAmelCase   )
																				else:
																											# middle
																											A__		   =							torch.utils.checkpoint.checkpoint(
																											    create_custom_forward(self.mid_block   )						,__UpperCAmelCase						,__UpperCAmelCase   )
																											A__		   =							sample.to(__UpperCAmelCase   )

																											# up
																											for up_block in self.up_blocks:
																																		A__		   =							torch.utils.checkpoint.checkpoint(create_custom_forward(__UpperCAmelCase   )						,__UpperCAmelCase						,__UpperCAmelCase   )
													else:
																				# middle
																				A__		   =							self.mid_block(__UpperCAmelCase						,__UpperCAmelCase   )
																				A__		   =							sample.to(__UpperCAmelCase   )

																				# up
																				for up_block in self.up_blocks:
																											A__		   =							up_block(__UpperCAmelCase						,__UpperCAmelCase   )

        # post-process
													if latent_embeds is None:
																				A__		   =							self.conv_norm_out(__UpperCAmelCase   )
													else:
																				A__		   =							self.conv_norm_out(__UpperCAmelCase						,__UpperCAmelCase   )
													A__		   =							self.conv_act(__UpperCAmelCase   )
													A__		   =							self.conv_out(__UpperCAmelCase   )

													return sample






class 			UpperCamelCase__(	nn.Module       ):





						def __init__(				self						,__UpperCAmelCase						,__UpperCAmelCase						,__UpperCAmelCase						,__UpperCAmelCase=None						,__UpperCAmelCase="random"						,__UpperCAmelCase=False						,__UpperCAmelCase=True   )    -> Tuple:
													super().__init__()
													A__		   =							n_e
													A__		   =							vq_embed_dim
													A__		   =							beta
													A__		   =							legacy

													A__		   =							nn.Embedding(self.n_e						,self.vq_embed_dim   )
													self.embedding.weight.data.uniform_(-1.0 / self.n_e						,1.0 / self.n_e   )

													A__		   =							remap
													if self.remap is not None:
																				self.register_buffer('used'						,torch.tensor(np.load(self.remap   )   )   )
																				A__		   =							self.used.shape[0]
																				A__		   =							unknown_index  # "random" or "extra" or integer
																				if self.unknown_index == "extra":
																											A__		   =							self.re_embed
																											A__		   =							self.re_embed + 1
																				print(
																				    f'''Remapping {self.n_e} indices to {self.re_embed} indices. '''
																				    f'''Using {self.unknown_index} for unknown indices.'''   )
													else:
																				A__		   =							n_e

													A__		   =							sane_index_shape





						def  snake_case__		(				self						,__UpperCAmelCase   )    -> List[str]:
													A__		   =							inds.shape
													assert len(__UpperCAmelCase   ) > 1
													A__		   =							inds.reshape(ishape[0]						,-1   )
													A__		   =							self.used.to(__UpperCAmelCase   )
													A__		   =							(inds[:, :, None] == used[None, None, ...]).long()
													A__		   =							match.argmax(-1   )
													A__		   =							match.sum(2   ) < 1
													if self.unknown_index == "random":
																				A__		   =							torch.randint(0						,self.re_embed						,size=new[unknown].shape   ).to(device=new.device   )
													else:
																				A__		   =							self.unknown_index
													return new.reshape(__UpperCAmelCase   )





						def  snake_case__		(				self						,__UpperCAmelCase   )    -> Optional[Any]:
													A__		   =							inds.shape
													assert len(__UpperCAmelCase   ) > 1
													A__		   =							inds.reshape(ishape[0]						,-1   )
													A__		   =							self.used.to(__UpperCAmelCase   )
													if self.re_embed > self.used.shape[0]:  # extra token
																				A__		   =							0  # simply set to zero
													A__		   =							torch.gather(used[None, :][inds.shape[0] * [0], :]						,1						,__UpperCAmelCase   )
													return back.reshape(__UpperCAmelCase   )





						def  snake_case__		(				self						,__UpperCAmelCase   )    -> Dict:
													# reshape z -> (batch, height, width, channel) and flatten
													A__		   =							z.permute(0						,2						,3						,1   ).contiguous()
													A__		   =							z.view(-1						,self.vq_embed_dim   )

													# distances from z to embeddings e_j (z - e)^2 = z^2 + e^2 - 2 e * z
													A__		   =							torch.argmin(torch.cdist(__UpperCAmelCase						,self.embedding.weight   )						,dim=1   )

													A__		   =							self.embedding(__UpperCAmelCase   ).view(z.shape   )
													A__		   =							None
													A__		   =							None

													# compute loss for embedding
													if not self.legacy:
																				A__		   =							self.beta * torch.mean((z_q.detach() - z) ** 2   ) + torch.mean((z_q - z.detach()) ** 2   )
													else:
																				A__		   =							torch.mean((z_q.detach() - z) ** 2   ) + self.beta * torch.mean((z_q - z.detach()) ** 2   )

													# preserve gradients
													A__		   =							z + (z_q - z).detach()

													# reshape back to match original input shape
													A__		   =							z_q.permute(0						,3						,1						,2   ).contiguous()

													if self.remap is not None:
																				A__		   =							min_encoding_indices.reshape(z.shape[0]						,-1   )  # add batch axis
																				A__		   =							self.remap_to_used(__UpperCAmelCase   )
																				A__		   =							min_encoding_indices.reshape(-1						,1   )  # flatten

													if self.sane_index_shape:
																				A__		   =							min_encoding_indices.reshape(z_q.shape[0]						,z_q.shape[2]						,z_q.shape[3]   )

													return z_q, loss, (perplexity, min_encodings, min_encoding_indices)





						def  snake_case__		(				self						,__UpperCAmelCase						,__UpperCAmelCase   )    -> str:
													# shape specifying (batch, height, width, channel)
													if self.remap is not None:
																				A__		   =							indices.reshape(shape[0]						,-1   )  # add batch axis
																				A__		   =							self.unmap_to_all(__UpperCAmelCase   )
																				A__		   =							indices.reshape(-1   )  # flatten again

													# get quantized latent vectors
													A__		   =							self.embedding(__UpperCAmelCase   )

													if shape is not None:
																				A__		   =							z_q.view(__UpperCAmelCase   )
																				# reshape back to match original input shape
																				A__		   =							z_q.permute(0						,3						,1						,2   ).contiguous()

													return z_q






class 			UpperCamelCase__(	__A       ):





						def __init__(				self						,__UpperCAmelCase						,__UpperCAmelCase=False   )    -> Any:
													A__		   =							parameters
													A__   ,     A__		   =							torch.chunk(__UpperCAmelCase						,2						,dim=1   )
													A__		   =							torch.clamp(self.logvar						,-3_0.0						,2_0.0   )
													A__		   =							deterministic
													A__		   =							torch.exp(0.5 * self.logvar   )
													A__		   =							torch.exp(self.logvar   )
													if self.deterministic:
																				A__		   =							A__		   =							torch.zeros_like(
																				    self.mean						,device=self.parameters.device						,dtype=self.parameters.dtype   )





						def  snake_case__		(				self						,__UpperCAmelCase = None   )    -> torch.FloatTensor:
													# make sure sample is on the same device as the parameters and has same dtype
													A__		   =							randn_tensor(
													    self.mean.shape						,generator=__UpperCAmelCase						,device=self.parameters.device						,dtype=self.parameters.dtype   )
													A__		   =							self.mean + self.std * sample
													return x





						def  snake_case__		(				self						,__UpperCAmelCase=None   )    -> int:
													if self.deterministic:
																				return torch.Tensor([0.0]   )
													else:
																				if other is None:
																											return 0.5 * torch.sum(torch.pow(self.mean						,2   ) + self.var - 1.0 - self.logvar						,dim=[1, 2, 3]   )
																				else:
																											return 0.5 * torch.sum(
																											    torch.pow(self.mean - other.mean						,2   ) / other.var
																											    + self.var / other.var
																											    - 1.0
																											    - self.logvar
																											    + other.logvar						,dim=[1, 2, 3]						,)





						def  snake_case__		(				self						,__UpperCAmelCase						,__UpperCAmelCase=[1, 2, 3]   )    -> List[Any]:
													if self.deterministic:
																				return torch.Tensor([0.0]   )
													A__		   =							np.log(2.0 * np.pi   )
													return 0.5 * torch.sum(logtwopi + self.logvar + torch.pow(sample - self.mean						,2   ) / self.var						,dim=__UpperCAmelCase   )





						def  snake_case__		(				self   )    -> Optional[Any]:
													return self.mean





