


from pickle import UnpicklingError

import jax
import jax.numpy as jnp
import numpy as np
from flax.serialization import from_bytes
from flax.traverse_util import flatten_dict

from ..utils import logging


lowerCAmelCase       =							logging.get_logger(__name__)
def 			_a (      SCREAMING_SNAKE_CASE						,				SCREAMING_SNAKE_CASE     ):


		"""simple docstring"""




		try:
				with open(SCREAMING_SNAKE_CASE						,				'''rb'''     ) as flax_state_f:
						lowercase__            =      from_bytes(SCREAMING_SNAKE_CASE						,				flax_state_f.read()     )
		except UnpicklingError as e:
				try:
						with open(SCREAMING_SNAKE_CASE     ) as f:
								if f.read().startswith('''version'''     ):
										raise OSError(
										    '''You seem to have cloned a repository without having git-lfs installed. Please'''
										    ''' install git-lfs and run `git lfs install` followed by `git lfs pull` in the'''
										    ''' folder you cloned.'''     )
								else:
										raise ValueError from e
				except (UnicodeDecodeError, ValueError):
						raise EnvironmentError(f'Unable to convert {model_file} to Flax deserializable object. '     )

		return load_flax_weights_in_pytorch_model(SCREAMING_SNAKE_CASE						,				SCREAMING_SNAKE_CASE     )
def 			_a (      SCREAMING_SNAKE_CASE						,				SCREAMING_SNAKE_CASE     ):


		"""simple docstring"""




		try:
				import torch  # noqa: F401
		except ImportError:
				logger.error(
				    '''Loading Flax weights in PyTorch requires both PyTorch and Flax to be installed. Please see'''
				    ''' https://pytorch.org/ and https://flax.readthedocs.io/en/latest/installation.html for installation'''
				    ''' instructions.'''     )
				raise

		# check if we have bf16 weights
		lowercase__            =      flatten_dict(jax.tree_util.tree_map(lambda SCREAMING_SNAKE_CASE     : x.dtype == jnp.bfloataa						,				SCREAMING_SNAKE_CASE     )     ).values()
		if any(SCREAMING_SNAKE_CASE     ):
				# convert all weights to fp32 if they are bf16 since torch.from_numpy can-not handle bf16

				# and bf16 is not fully supported in PT yet.
				logger.warning(
				    '''Found ``bfloat16`` weights in Flax model. Casting all ``bfloat16`` weights to ``float32`` '''
				    '''before loading those in PyTorch model.'''     )
				lowercase__            =      jax.tree_util.tree_map(
				    lambda SCREAMING_SNAKE_CASE     : params.astype(np.floataa     ) if params.dtype == jnp.bfloataa else params						,				SCREAMING_SNAKE_CASE     )

		lowercase__            =      ''''''

		lowercase__            =      flatten_dict(SCREAMING_SNAKE_CASE						,				sep='''.'''     )
		lowercase__            =      pt_model.state_dict()

		# keep track of unexpected & missing keys
		lowercase__            =      []
		lowercase__            =      set(pt_model_dict.keys()     )

		for flax_key_tuple, flax_tensor in flax_state_dict.items():
				lowercase__            =      flax_key_tuple.split('''.'''     )

				if flax_key_tuple_array[-1] == "kernel" and flax_tensor.ndim == 4:
						lowercase__            =      flax_key_tuple_array[:-1] + ['''weight''']
						lowercase__            =      jnp.transpose(SCREAMING_SNAKE_CASE						,				(3, 2, 0, 1)     )
				elif flax_key_tuple_array[-1] == "kernel":
						lowercase__            =      flax_key_tuple_array[:-1] + ['''weight''']
						lowercase__            =      flax_tensor.T
				elif flax_key_tuple_array[-1] == "scale":
						lowercase__            =      flax_key_tuple_array[:-1] + ['''weight''']

				if "time_embedding" not in flax_key_tuple_array:
						for i, flax_key_tuple_string in enumerate(SCREAMING_SNAKE_CASE     ):
								lowercase__            =      (
								    flax_key_tuple_string.replace('''_0'''						,				'''.0'''     )
								    .replace('''_1'''						,				'''.1'''     )
								    .replace('''_2'''						,				'''.2'''     )
								    .replace('''_3'''						,				'''.3'''     )
								    .replace('''_4'''						,				'''.4'''     )
								    .replace('''_5'''						,				'''.5'''     )
								    .replace('''_6'''						,				'''.6'''     )
								    .replace('''_7'''						,				'''.7'''     )
								    .replace('''_8'''						,				'''.8'''     )
								    .replace('''_9'''						,				'''.9'''     )
								)

				lowercase__            =      '''.'''.join(SCREAMING_SNAKE_CASE     )

				if flax_key in pt_model_dict:
						if flax_tensor.shape != pt_model_dict[flax_key].shape:
								raise ValueError(
								    f'Flax checkpoint seems to be incorrect. Weight {flax_key_tuple} was expected '
								    f'to be of shape {pt_model_dict[flax_key].shape}, but is {flax_tensor.shape}.'     )
						else:
								# add weight to pytorch dict
								lowercase__            =      np.asarray(SCREAMING_SNAKE_CASE     ) if not isinstance(SCREAMING_SNAKE_CASE						,				np.ndarray     ) else flax_tensor
								lowercase__            =      torch.from_numpy(SCREAMING_SNAKE_CASE     )
								# remove from missing keys
								missing_keys.remove(SCREAMING_SNAKE_CASE     )
				else:
						# weight is not expected by PyTorch model
						unexpected_keys.append(SCREAMING_SNAKE_CASE     )

		pt_model.load_state_dict(SCREAMING_SNAKE_CASE     )

		# re-transform missing_keys to list
		lowercase__            =      list(SCREAMING_SNAKE_CASE     )

		if len(SCREAMING_SNAKE_CASE     ) > 0:
				logger.warning(
				    '''Some weights of the Flax model were not used when initializing the PyTorch model'''
				    f' {pt_model.__class__.__name__}: {unexpected_keys}\n- This IS expected if you are initializing'
				    f' {pt_model.__class__.__name__} from a Flax model trained on another task or with another architecture'
				    ''' (e.g. initializing a BertForSequenceClassification model from a FlaxBertForPreTraining model).\n- This'''
				    f' IS NOT expected if you are initializing {pt_model.__class__.__name__} from a Flax model that you expect'
				    ''' to be exactly identical (e.g. initializing a BertForSequenceClassification model from a'''
				    ''' FlaxBertForSequenceClassification model).'''     )
		if len(SCREAMING_SNAKE_CASE     ) > 0:
				logger.warning(
				    f'Some weights of {pt_model.__class__.__name__} were not initialized from the Flax model and are newly'
				    f' initialized: {missing_keys}\nYou should probably TRAIN this model on a down-stream task to be able to'
				    ''' use it for predictions and inference.'''     )

		return pt_model









import torch

from diffusers import DDPMParallelScheduler

from .test_schedulers import SchedulerCommonTest



class    _SCREAMING_SNAKE_CASE						(	__SCREAMING_SNAKE_CASE    ):







 '''simple docstring'''
 lowercase_		=			(DDPMParallelScheduler,)

 def 							SCREAMING_SNAKE_CASE_					(self				:   Any       , **UpperCAmelCase_				:   Any)       ->Any:



   '''simple docstring'''



   lowerCamelCase__:      Any			  ={
       "num_train_timesteps": 1_000,
       "beta_start": 0.0001,
       "beta_end": 0.02,
       "beta_schedule": "linear",
       "variance_type": "fixed_small",
       "clip_sample": True,
   }

   config.update(**UpperCAmelCase_)
   return config

 def 							SCREAMING_SNAKE_CASE_					(self				:   int)       ->Dict:



   '''simple docstring'''



   for timesteps in [1, 5, 100, 1_000]:
     self.check_over_configs(num_train_timesteps=UpperCAmelCase_)

 def 							SCREAMING_SNAKE_CASE_					(self				:   int)       ->Optional[int]:



   '''simple docstring'''



   for beta_start, beta_end in zip([0.0001, 0.001, 0.01, 0.1]       , [0.002, 0.02, 0.2, 2]):
     self.check_over_configs(beta_start=UpperCAmelCase_       , beta_end=UpperCAmelCase_)

 def 							SCREAMING_SNAKE_CASE_					(self				:   Optional[Any])       ->Any:



   '''simple docstring'''



   for schedule in ["linear", "squaredcos_cap_v2"]:
     self.check_over_configs(beta_schedule=UpperCAmelCase_)

 def 							SCREAMING_SNAKE_CASE_					(self				:   int)       ->Optional[int]:



   '''simple docstring'''



   for variance in ["fixed_small", "fixed_large", "other"]:
     self.check_over_configs(variance_type=UpperCAmelCase_)

 def 							SCREAMING_SNAKE_CASE_					(self				:   Optional[int])       ->Optional[Any]:



   '''simple docstring'''



   for clip_sample in [True, False]:
     self.check_over_configs(clip_sample=UpperCAmelCase_)

 def 							SCREAMING_SNAKE_CASE_					(self				:   Any)       ->Tuple:



   '''simple docstring'''



   self.check_over_configs(thresholding=UpperCAmelCase_)
   for threshold in [0.5, 1.0, 2.0]:
     for prediction_type in ["epsilon", "sample", "v_prediction"]:
       self.check_over_configs(
           thresholding=UpperCAmelCase_       , prediction_type=UpperCAmelCase_       , sample_max_value=UpperCAmelCase_       , )

 def 							SCREAMING_SNAKE_CASE_					(self				:   Any)       ->Optional[int]:



   '''simple docstring'''



   for prediction_type in ["epsilon", "sample", "v_prediction"]:
     self.check_over_configs(prediction_type=UpperCAmelCase_)

 def 							SCREAMING_SNAKE_CASE_					(self				:   int)       ->int:



   '''simple docstring'''



   for t in [0, 500, 999]:
     self.check_over_forward(time_step=UpperCAmelCase_)

 def 							SCREAMING_SNAKE_CASE_					(self				:   Optional[Any])       ->str:



   '''simple docstring'''



   lowerCamelCase__:      Dict			  =self.scheduler_classes[0]
   lowerCamelCase__:      Tuple			  =self.get_scheduler_config()
   lowerCamelCase__:      Any			  =scheduler_class(**UpperCAmelCase_)

   assert torch.sum(torch.abs(scheduler._get_variance(0) - 0.0)) < 1E-5
   assert torch.sum(torch.abs(scheduler._get_variance(487) - 0.0_0979)) < 1E-5
   assert torch.sum(torch.abs(scheduler._get_variance(999) - 0.02)) < 1E-5

 def 							SCREAMING_SNAKE_CASE_					(self				:   Any)       ->str:



   '''simple docstring'''



   lowerCamelCase__:      int			  =self.scheduler_classes[0]
   lowerCamelCase__:      Tuple			  =self.get_scheduler_config()
   lowerCamelCase__:      Tuple			  =scheduler_class(**UpperCAmelCase_)

   lowerCamelCase__:      str			  =len(UpperCAmelCase_)

   lowerCamelCase__:      Optional[int]			  =self.dummy_model()
   lowerCamelCase__:      int			  =self.dummy_sample_deter
   lowerCamelCase__:      Union[str, Any]			  =self.dummy_sample_deter + 0.1
   lowerCamelCase__:      Optional[Any]			  =self.dummy_sample_deter - 0.1

   lowerCamelCase__:      Optional[Any]			  =samplea.shape[0]
   lowerCamelCase__:      List[Any]			  =torch.stack([samplea, samplea, samplea]       , dim=0)
   lowerCamelCase__:      Union[str, Any]			  =torch.arange(UpperCAmelCase_)[0:3, None].repeat(1       , UpperCAmelCase_)

   lowerCamelCase__:      Optional[int]			  =model(samples.flatten(0       , 1)       , timesteps.flatten(0       , 1))
   lowerCamelCase__:      Tuple			  =scheduler.batch_step_no_noise(UpperCAmelCase_       , timesteps.flatten(0       , 1)       , samples.flatten(0       , 1))

   lowerCamelCase__:      List[str]			  =torch.sum(torch.abs(UpperCAmelCase_))
   lowerCamelCase__:      Any			  =torch.mean(torch.abs(UpperCAmelCase_))

   assert abs(result_sum.item() - 1153.1833) < 1E-2
   assert abs(result_mean.item() - 0.5005) < 1E-3

 def 							SCREAMING_SNAKE_CASE_					(self				:   Optional[Any])       ->Union[str, Any]:



   '''simple docstring'''



   lowerCamelCase__:      Any			  =self.scheduler_classes[0]
   lowerCamelCase__:      Optional[Any]			  =self.get_scheduler_config()
   lowerCamelCase__:      Optional[int]			  =scheduler_class(**UpperCAmelCase_)

   lowerCamelCase__:      Union[str, Any]			  =len(UpperCAmelCase_)

   lowerCamelCase__:      Union[str, Any]			  =self.dummy_model()
   lowerCamelCase__:      List[Any]			  =self.dummy_sample_deter
   lowerCamelCase__:      int			  =torch.manual_seed(0)

   for t in reversed(range(UpperCAmelCase_)):
     # 1. predict noise residual
     lowerCamelCase__:      Tuple			  =model(UpperCAmelCase_       , UpperCAmelCase_)

     # 2. predict previous mean of sample x_t-1
     lowerCamelCase__:      Optional[Any]			  =scheduler.step(UpperCAmelCase_       , UpperCAmelCase_       , UpperCAmelCase_       , generator=UpperCAmelCase_).prev_sample

     lowerCamelCase__:      Any			  =pred_prev_sample

   lowerCamelCase__:      Any			  =torch.sum(torch.abs(UpperCAmelCase_))
   lowerCamelCase__:      List[str]			  =torch.mean(torch.abs(UpperCAmelCase_))

   assert abs(result_sum.item() - 258.9606) < 1E-2
   assert abs(result_mean.item() - 0.3372) < 1E-3

 def 							SCREAMING_SNAKE_CASE_					(self				:   int)       ->Any:



   '''simple docstring'''



   lowerCamelCase__:      Tuple			  =self.scheduler_classes[0]
   lowerCamelCase__:      Any			  =self.get_scheduler_config(prediction_type="v_prediction")
   lowerCamelCase__:      Any			  =scheduler_class(**UpperCAmelCase_)

   lowerCamelCase__:      str			  =len(UpperCAmelCase_)

   lowerCamelCase__:      str			  =self.dummy_model()
   lowerCamelCase__:      str			  =self.dummy_sample_deter
   lowerCamelCase__:      Dict			  =torch.manual_seed(0)

   for t in reversed(range(UpperCAmelCase_)):
     # 1. predict noise residual
     lowerCamelCase__:      Union[str, Any]			  =model(UpperCAmelCase_       , UpperCAmelCase_)

     # 2. predict previous mean of sample x_t-1
     lowerCamelCase__:      Dict			  =scheduler.step(UpperCAmelCase_       , UpperCAmelCase_       , UpperCAmelCase_       , generator=UpperCAmelCase_).prev_sample

     lowerCamelCase__:      List[str]			  =pred_prev_sample

   lowerCamelCase__:      List[Any]			  =torch.sum(torch.abs(UpperCAmelCase_))
   lowerCamelCase__:      Tuple			  =torch.mean(torch.abs(UpperCAmelCase_))

   assert abs(result_sum.item() - 202.0296) < 1E-2
   assert abs(result_mean.item() - 0.2631) < 1E-3

 def 							SCREAMING_SNAKE_CASE_					(self				:   Tuple)       ->Optional[int]:



   '''simple docstring'''



   lowerCamelCase__:      str			  =self.scheduler_classes[0]
   lowerCamelCase__:      Union[str, Any]			  =self.get_scheduler_config()
   lowerCamelCase__:      Any			  =scheduler_class(**UpperCAmelCase_)

   lowerCamelCase__:      List[Any]			  =[100, 87, 50, 1, 0]

   scheduler.set_timesteps(timesteps=UpperCAmelCase_)

   lowerCamelCase__:      Union[str, Any]			  =scheduler.timesteps

   for i, timestep in enumerate(UpperCAmelCase_):
     if i == len(UpperCAmelCase_) - 1:
       lowerCamelCase__:      Dict			  =-1
     else:
       lowerCamelCase__:      Union[str, Any]			  =timesteps[i + 1]

     lowerCamelCase__:      Tuple			  =scheduler.previous_timestep(UpperCAmelCase_)
     lowerCamelCase__:      str			  =prev_t.item()

     self.assertEqual(UpperCAmelCase_       , UpperCAmelCase_)

 def 							SCREAMING_SNAKE_CASE_					(self				:   Union[str, Any])       ->Union[str, Any]:



   '''simple docstring'''



   lowerCamelCase__:      Tuple			  =self.scheduler_classes[0]
   lowerCamelCase__:      List[Any]			  =self.get_scheduler_config()
   lowerCamelCase__:      Dict			  =scheduler_class(**UpperCAmelCase_)

   lowerCamelCase__:      Optional[Any]			  =[100, 87, 50, 51, 0]

   with self.assertRaises(UpperCAmelCase_       , msg="`custom_timesteps` must be in descending order."):
     scheduler.set_timesteps(timesteps=UpperCAmelCase_)

 def 							SCREAMING_SNAKE_CASE_					(self				:   List[Any])       ->List[Any]:



   '''simple docstring'''



   lowerCamelCase__:      Dict			  =self.scheduler_classes[0]
   lowerCamelCase__:      Any			  =self.get_scheduler_config()
   lowerCamelCase__:      int			  =scheduler_class(**UpperCAmelCase_)

   lowerCamelCase__:      Optional[int]			  =[100, 87, 50, 1, 0]
   lowerCamelCase__:      int			  =len(UpperCAmelCase_)

   with self.assertRaises(UpperCAmelCase_       , msg="Can only pass one of `num_inference_steps` or `custom_timesteps`."):
     scheduler.set_timesteps(num_inference_steps=UpperCAmelCase_       , timesteps=UpperCAmelCase_)







 def 							SCREAMING_SNAKE_CASE_					(self				:   Optional[Any])       ->Any:



   '''simple docstring'''



   lowerCamelCase__:      Tuple			  =self.scheduler_classes[0]
   lowerCamelCase__:      Optional[Any]			  =self.get_scheduler_config()
   lowerCamelCase__:      Optional[Any]			  =scheduler_class(**UpperCAmelCase_)

   lowerCamelCase__:      Dict			  =[scheduler.config.num_train_timesteps]

   with self.assertRaises(
       UpperCAmelCase_       , msg="`timesteps` must start before `self.config.train_timesteps`: {scheduler.config.num_train_timesteps}}"       , ):
     scheduler.set_timesteps(timesteps=UpperCAmelCase_)

