

class  lowercase				:




				def __init__(					self      ,   snake_case      ,   snake_case=None      ,   snake_case=None       ):
											snake_case_							=    data
											snake_case_							=    previous
											snake_case_							=    next_node




				def __str__(					self       ):
											return F'''{self.data}'''




				def     a							(					self       ):
											return self.data




				def     a							(					self       ):
											return self.next




				def     a							(					self       ):
											return self.previous







class  lowercase				:




				def __init__(					self      ,   snake_case       ):
											snake_case_							=    head




				def __iter__(					self       ):
											return self




				def     a							(					self       ):
											if not self.current:
																		raise StopIteration
											else:
																		snake_case_							=    self.current.get_data()
																		snake_case_							=    self.current.get_next()
																		return value







class  lowercase				:




				def __init__(					self       ):
											snake_case_							=    None  # First node in list
											snake_case_							=    None  # Last node in list




				def __str__(					self       ):
											snake_case_							=    self.head
											snake_case_							=    []
											while current is not None:
																		nodes.append(current.get_data()       )
																		snake_case_							=    current.get_next()
											return " ".join(str(snake_case       ) for node in nodes       )




				def __contains__(					self      ,   snake_case       ):
											snake_case_							=    self.head
											while current:
																		if current.get_data() == value:
																									return True
																		snake_case_							=    current.get_next()
											return False




				def __iter__(					self       ):
											return LinkedListIterator(self.head       )




				def     a							(					self       ):
											if self.head:
																		return self.head.get_data()
											return None




				def     a							(					self       ):
											if self.tail:
																		return self.tail.get_data()
											return None




				def     a							(					self      ,   snake_case       ):
											if self.head is None:
																		snake_case_							=    node
																		snake_case_							=    node
											else:
																		self.insert_before_node(self.head      ,   snake_case       )




				def     a							(					self      ,   snake_case       ):
											if self.head is None:
																		self.set_head(snake_case       )
											else:
																		self.insert_after_node(self.tail      ,   snake_case       )




				def     a							(					self      ,   snake_case       ):
											snake_case_							=    Node(snake_case       )
											if self.head is None:
																		self.set_head(snake_case       )
											else:
																		self.set_tail(snake_case       )




				def     a							(					self      ,   snake_case      ,   snake_case       ):
											snake_case_							=    node
											snake_case_							=    node.previous

											if node.get_previous() is None:
																		snake_case_							=    node_to_insert
											else:
																		snake_case_							=    node_to_insert

											snake_case_							=    node_to_insert




				def     a							(					self      ,   snake_case      ,   snake_case       ):
											snake_case_							=    node
											snake_case_							=    node.next

											if node.get_next() is None:
																		snake_case_							=    node_to_insert
											else:
																		snake_case_							=    node_to_insert

											snake_case_							=    node_to_insert




				def     a							(					self      ,   snake_case      ,   snake_case       ):
											snake_case_							=    1
											snake_case_							=    Node(snake_case       )
											snake_case_							=    self.head
											while node:
																		if current_position == position:
																									self.insert_before_node(snake_case      ,   snake_case       )
																									return
																		current_position += 1
																		snake_case_							=    node.next
											self.insert_after_node(self.tail      ,   snake_case       )




				def     a							(					self      ,   snake_case       ):
											snake_case_							=    self.head
											while node:
																		if node.get_data() == item:
																									return node
																		snake_case_							=    node.get_next()
											raise Exception('Node not found'       )




				def     a							(					self      ,   snake_case       ):
											if (node := self.get_node(snake_case       )) is not None:
																		if node == self.head:
																									snake_case_							=    self.head.get_next()

																		if node == self.tail:
																									snake_case_							=    self.tail.get_previous()

																		self.remove_node_pointers(snake_case       )




				@staticmethod
				def     a							(					snake_case       ):
											if node.get_next():
																		snake_case_							=    node.previous

											if node.get_previous():
																		snake_case_							=    node.next

											snake_case_							=    None
											snake_case_							=    None




				def     a							(					self       ):
											return self.head is None





def 					__lowerCamelCase	( ):







							'''simple docstring'''








if __name__ == "__main__":
					import doctest

					doctest.testmod()







import os

import pytest
import yaml

from datasets.features.features import Features, Value
from datasets.info import DatasetInfo, DatasetInfosDict





@pytest.mark.parametrize(
    'files'   ,							[
        ['full:README.md', 'dataset_infos.json'],
        ['empty:README.md', 'dataset_infos.json'],
        ['dataset_infos.json'],
        ['full:README.md'],
    ]   ,							)
def 					__lowerCamelCase	( UpperCamelCase__   ,							UpperCamelCase__      ):







							'''simple docstring'''






							snake_case_							=    tmp_path_factory.mktemp('dset_infos_dir'      )
							if "full:README.md" in files:
														with open(dataset_infos_dir / 'README.md'   ,							'w'      ) as f:
																					f.write('---\ndataset_info:\n  dataset_size: 42\n---'      )
							if "empty:README.md" in files:
														with open(dataset_infos_dir / 'README.md'   ,							'w'      ) as f:
																					f.write(''      )
    # we want to support dataset_infos.json for backward compatibility
							if "dataset_infos.json" in files:
														with open(dataset_infos_dir / 'dataset_infos.json'   ,							'w'      ) as f:
																					f.write('{"default": {"dataset_size": 42}}'      )
							snake_case_							=    DatasetInfosDict.from_directory(UpperCamelCase__      )
							assert dataset_infos
							assert dataset_infos["default"].dataset_size == 42





@pytest.mark.parametrize(
    'dataset_info'   ,							[
        DatasetInfo(),
        DatasetInfo(
            description='foo'   ,							features=Features({'a': Value('int32'      )}      )   ,							builder_name='builder'   ,							config_name='config'   ,							version='1.0.0'   ,							splits=[{'name': 'train'}]   ,							download_size=42   ,							),
    ]   ,							)
def 					__lowerCamelCase	( UpperCamelCase__   ,							UpperCamelCase__      ):







							'''simple docstring'''






							snake_case_							=    str(UpperCamelCase__      )
							dataset_info.write_to_directory(UpperCamelCase__      )
							snake_case_							=    DatasetInfo.from_directory(UpperCamelCase__      )
							assert dataset_info == reloaded
							assert os.path.exists(os.path.join(UpperCamelCase__   ,							'dataset_info.json'      )      )





def 					__lowerCamelCase	( ):







							'''simple docstring'''






							snake_case_							=    DatasetInfo(
							    description='foo'   ,							citation='bar'   ,							homepage='https://foo.bar'   ,							license='CC0'   ,							features=Features({'a': Value('int32'      )}      )   ,							post_processed={}   ,							supervised_keys=()   ,							task_templates=[]   ,							builder_name='builder'   ,							config_name='config'   ,							version='1.0.0'   ,							splits=[{'name': 'train', 'num_examples': 42}]   ,							download_checksums={}   ,							download_size=1337   ,							post_processing_size=442   ,							dataset_size=1234   ,							size_in_bytes=1337 + 442 + 1234   ,							)
							snake_case_							=    dataset_info._to_yaml_dict()
							assert sorted(UpperCamelCase__      ) == sorted(DatasetInfo._INCLUDED_INFO_IN_YAML      )
							for key in DatasetInfo._INCLUDED_INFO_IN_YAML:
														assert key in dataset_info_yaml_dict
														assert isinstance(dataset_info_yaml_dict[key]   ,							(list, dict, int, str)      )
							snake_case_							=    yaml.safe_dump(UpperCamelCase__      )
							snake_case_							=    yaml.safe_load(UpperCamelCase__      )
							assert dataset_info_yaml_dict == reloaded





def 					__lowerCamelCase	( ):







							'''simple docstring'''






							snake_case_							=    DatasetInfo()
							snake_case_							=    dataset_info._to_yaml_dict()
							assert dataset_info_yaml_dict == {}





@pytest.mark.parametrize(
    'dataset_infos_dict'   ,							[
        DatasetInfosDict(),
        DatasetInfosDict({'default': DatasetInfo()}      ),
        DatasetInfosDict({'my_config_name': DatasetInfo()}      ),
        DatasetInfosDict(
            {
                'default': DatasetInfo(
                    description='foo'   ,							features=Features({'a': Value('int32'      )}      )   ,							builder_name='builder'   ,							config_name='config'   ,							version='1.0.0'   ,							splits=[{'name': 'train'}]   ,							download_size=42   ,							)
            }      ),
        DatasetInfosDict(
            {
                'v1': DatasetInfo(dataset_size=42      ),
                'v2': DatasetInfo(dataset_size=1337      ),
            }      ),
    ]   ,							)
def 					__lowerCamelCase	( UpperCamelCase__   ,							UpperCamelCase__      ):







							'''simple docstring'''






							snake_case_							=    str(UpperCamelCase__      )
							dataset_infos_dict.write_to_directory(UpperCamelCase__      )
							snake_case_							=    DatasetInfosDict.from_directory(UpperCamelCase__      )

							# the config_name of the dataset_infos_dict take over the attribute
							for config_name, dataset_info in dataset_infos_dict.items():
														snake_case_							=    config_name
														# the yaml representation doesn't include fields like description or citation
														# so we just test that we can recover what we can from the yaml
														snake_case_							=    DatasetInfo._from_yaml_dict(dataset_info._to_yaml_dict()      )
							assert dataset_infos_dict == reloaded

							if dataset_infos_dict:
														assert os.path.exists(os.path.join(UpperCamelCase__   ,							'README.md'      )      )




