





'''simple docstring'''




# Copyright 2021 The HuggingFace Team. All rights reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.


import warnings
from typing import List
from unittest.mock import Mock

import torch
from torch.utils.data import DataLoader, IterableDataset, TensorDataset

from accelerate.accelerator import Accelerator
from accelerate.utils.dataclasses import DistributedType







class   A_	(  lowerCAmelCase_			):




 def __init__(					self       :    Union[str, Any]	,			snake_case_       :    Union[str, Any]    ):
      _UpperCAmelCase     							=   data




 def __iter__(					self       :    Any    ):
      for element in self.data:
           yield element





def 	UpperCAmelCase_							(					__lowercase							:      Optional[int]=True       )		->       Optional[int]:


     '''simple docstring'''



     _UpperCAmelCase     							=   Accelerator(even_batches=__lowercase       )
     assert accelerator.num_processes == 2, "this script expects that two GPUs are available"
     return accelerator
def 	UpperCAmelCase_							(					__lowercase							:      Accelerator			,     __lowercase							:      int			,     __lowercase							:      int			,     __lowercase							:      bool = False       )		->       Tuple:


     '''simple docstring'''



     if iterable:
          _UpperCAmelCase     							=   DummyIterableDataset(torch.as_tensor(range(__lowercase       )       )       )
     else:
          _UpperCAmelCase     							=   TensorDataset(torch.as_tensor(range(__lowercase       )       )       )

     _UpperCAmelCase     							=   DataLoader(__lowercase			,     batch_size=__lowercase       )
     _UpperCAmelCase     							=   accelerator.prepare(__lowercase       )

     return dl
def 	UpperCAmelCase_							(					__lowercase							:      Accelerator			,     __lowercase							:      int			,     __lowercase							:      int			,     __lowercase							:      List[int]			,     __lowercase							:      List[int]			,     )		->       Tuple:


     '''simple docstring'''



     _UpperCAmelCase     							=   create_dataloader(accelerator=__lowercase			,     dataset_size=__lowercase			,     batch_size=__lowercase       )

     _UpperCAmelCase     							=   [len(batch[0]       ) for batch in dl]

     if accelerator.process_index == 0:
          assert batch_sizes == process_0_expected_batch_sizes
     elif accelerator.process_index == 1:
          assert batch_sizes == process_1_expected_batch_sizes
def 	UpperCAmelCase_							(					)		->       List[Any]:


     '''simple docstring'''



     _UpperCAmelCase     							=   create_accelerator()

     # without padding, we would expect a different number of batches
     verify_dataloader_batch_sizes(
         __lowercase			,     dataset_size=3			,     batch_size=1			,     process_0_expected_batch_sizes=[1, 1]			,     process_1_expected_batch_sizes=[1, 1]			,     )

     # without padding, we would expect the same number of batches, but different sizes
     verify_dataloader_batch_sizes(
         __lowercase			,     dataset_size=7			,     batch_size=2			,     process_0_expected_batch_sizes=[2, 2]			,     process_1_expected_batch_sizes=[2, 2]			,     )
def 	UpperCAmelCase_							(					)		->       int:


     '''simple docstring'''



     _UpperCAmelCase     							=   create_accelerator(even_batches=__lowercase       )

     verify_dataloader_batch_sizes(
         __lowercase			,     dataset_size=3			,     batch_size=1			,     process_0_expected_batch_sizes=[1, 1]			,     process_1_expected_batch_sizes=[1]			,     )

     verify_dataloader_batch_sizes(
         __lowercase			,     dataset_size=7			,     batch_size=2			,     process_0_expected_batch_sizes=[2, 2]			,     process_1_expected_batch_sizes=[2, 1]			,     )
def 	UpperCAmelCase_							(					)		->       int:


     '''simple docstring'''



     _UpperCAmelCase     							=   create_accelerator(even_batches=__lowercase       )

     _UpperCAmelCase     							=   torch.nn.Linear(1			,     1       )
     _UpperCAmelCase     							=   accelerator.prepare(__lowercase       )

     _UpperCAmelCase     							=   create_dataloader(__lowercase			,     dataset_size=3			,     batch_size=1       )

     _UpperCAmelCase     							=   []
     with accelerator.join_uneven_inputs([ddp_model]       ):
          for batch_idx, batch in enumerate(__lowercase       ):
               _UpperCAmelCase     							=   ddp_model(batch[0].float()       )
               _UpperCAmelCase     							=   output.sum()
               loss.backward()
               batch_idxs.append(__lowercase       )

     accelerator.wait_for_everyone()

     if accelerator.process_index == 0:
          assert batch_idxs == [0, 1]
     elif accelerator.process_index == 1:
          assert batch_idxs == [0]
def 	UpperCAmelCase_							(					__lowercase							:      List[Any]       )		->       Tuple:


     '''simple docstring'''



     with warnings.catch_warnings(record=__lowercase       ) as w:
          with accelerator.join_uneven_inputs([Mock()]       ):
               pass

          assert issubclass(w[-1].category			,     __lowercase       )
          assert "only supported for multi-GPU" in str(w[-1].message       )
def 	UpperCAmelCase_							(					)		->       Optional[Any]:


     '''simple docstring'''



     _UpperCAmelCase     							=   True
     _UpperCAmelCase     							=   False
     _UpperCAmelCase     							=   create_accelerator(even_batches=__lowercase       )
     _UpperCAmelCase     							=   torch.nn.Linear(1			,     1       )
     _UpperCAmelCase     							=   accelerator.prepare(__lowercase       )
     _UpperCAmelCase     							=   create_dataloader(__lowercase			,     dataset_size=3			,     batch_size=1       )
     _UpperCAmelCase     							=   create_dataloader(__lowercase			,     dataset_size=3			,     batch_size=1       )

     with accelerator.join_uneven_inputs([ddp_model]			,     even_batches=__lowercase       ):
          _UpperCAmelCase     							=   train_dl.batch_sampler.even_batches
          _UpperCAmelCase     							=   valid_dl.batch_sampler.even_batches

     assert train_dl_overridden_value == overridden_even_batches
     assert valid_dl_overridden_value == overridden_even_batches
     assert train_dl.batch_sampler.even_batches == default_even_batches
     assert valid_dl.batch_sampler.even_batches == default_even_batches
def 	UpperCAmelCase_							(					)		->       Dict:


     '''simple docstring'''



     _UpperCAmelCase     							=   True
     _UpperCAmelCase     							=   False
     _UpperCAmelCase     							=   create_accelerator(even_batches=__lowercase       )
     _UpperCAmelCase     							=   torch.nn.Linear(1			,     1       )
     _UpperCAmelCase     							=   accelerator.prepare(__lowercase       )
     create_dataloader(__lowercase			,     dataset_size=3			,     batch_size=1			,     iterable=__lowercase       )
     _UpperCAmelCase     							=   create_dataloader(__lowercase			,     dataset_size=3			,     batch_size=1       )

     with warnings.catch_warnings():
          warnings.filterwarnings("ignore"       )
          try:
               with accelerator.join_uneven_inputs([ddp_model]			,     even_batches=__lowercase       ):
                    _UpperCAmelCase     							=   batch_dl.batch_sampler.even_batches
          except AttributeError:
               # ensure attribute error is not raised when processing iterable dl
               raise AssertionError

     assert batch_dl_overridden_value == overridden_even_batches
     assert batch_dl.batch_sampler.even_batches == default_even_batches
def 	UpperCAmelCase_							(					)		->       List[str]:


     '''simple docstring'''



     _UpperCAmelCase     							=   create_accelerator()
     _UpperCAmelCase     							=   torch.nn.Linear(1			,     1       )
     _UpperCAmelCase     							=   accelerator.prepare(__lowercase       )
     create_dataloader(__lowercase			,     dataset_size=3			,     batch_size=1			,     iterable=__lowercase       )

     with warnings.catch_warnings(record=__lowercase       ) as w:
          with accelerator.join_uneven_inputs([ddp_model]			,     even_batches=__lowercase       ):
               pass

          assert issubclass(w[-1].category			,     __lowercase       )
          assert "only supported for map-style datasets" in str(w[-1].message       )
def 	UpperCAmelCase_							(					)		->       Optional[int]:


     '''simple docstring'''



     _UpperCAmelCase     							=   create_accelerator()

     accelerator.print("Test that even_batches variable ensures uniform batches across processes"       )
     test_default_ensures_even_batch_sizes()

     accelerator.print("Run tests with even_batches disabled"       )
     test_can_disable_even_batches()

     accelerator.print("Test joining uneven inputs"       )
     test_can_join_uneven_inputs()

     accelerator.print("Test overriding even_batches when joining uneven inputs"       )
     test_join_can_override_even_batches()

     accelerator.print("Test overriding even_batches for mixed dataloader types"       )
     test_join_can_override_for_mixed_type_dataloaders()

     accelerator.print("Test overriding even_batches raises a warning for iterable dataloaders"       )
     test_join_raises_warning_for_iterable_when_overriding_even_batches()

     accelerator.print("Test join with non DDP distributed raises warning"       )
     _UpperCAmelCase     							=   accelerator.state.distributed_type
     _UpperCAmelCase     							=   DistributedType.FSDP
     test_join_raises_warning_for_non_ddp_distributed(__lowercase       )
     _UpperCAmelCase     							=   original_state


if __name__ == "__main__":
  main()











'''simple docstring'''




def 	UpperCAmelCase_							(					__lowercase							:      str       )		->       str:


     '''simple docstring'''



     return " ".join(
         "".join(word[::-1]       ) if len(__lowercase       ) > 4 else word for word in sentence.split()       )


if __name__ == "__main__":
  import doctest

  doctest.testmod()
  print(reverse_long_words('''Hey wollef sroirraw'''))




