





'''simple docstring'''






from abc import ABC, abstractmethod
from typing import Optional, Union

from .. import Dataset, DatasetDict, Features, IterableDataset, IterableDatasetDict, NamedSplit
from ..utils.typing import NestedDataStructureLike, PathLike




class 			UpperCAmelCase					(      snake_case_       ):




      def __init__(      self      :			Dict      ,      __snake_case      :			Optional[NestedDataStructureLike[PathLike]] = None      ,      __snake_case      :			Optional[NamedSplit] = None      ,      __snake_case      :			Optional[Features] = None      ,      __snake_case      :			str = None      ,      __snake_case      :			bool = False      ,      __snake_case      :			bool = False      ,      __snake_case      :			Optional[int] = None      ,      **__snake_case      :			Optional[Any]      ,      )    ->				Dict:
            _lowerCAmelCase												=							path_or_paths
            _lowerCAmelCase												=							split if split or isinstance(__snake_case      ,      __snake_case  ) else """train"""
            _lowerCAmelCase												=							features
            _lowerCAmelCase												=							cache_dir
            _lowerCAmelCase												=							keep_in_memory
            _lowerCAmelCase												=							streaming
            _lowerCAmelCase												=							num_proc
            _lowerCAmelCase												=							kwargs




      @abstractmethod
      def     lowercase__   (      self      :			Any  )    ->				Union[Dataset, DatasetDict, IterableDataset, IterableDatasetDict]:
            pass




class 			UpperCAmelCase					(      snake_case_       ):




      def __init__(      self      :			List[Any]      ,      __snake_case      :			Optional[Features] = None      ,      __snake_case      :			str = None      ,      __snake_case      :			bool = False      ,      __snake_case      :			bool = False      ,      __snake_case      :			Optional[int] = None      ,      **__snake_case      :			List[Any]      ,      )    ->				Optional[Any]:
            _lowerCAmelCase												=							features
            _lowerCAmelCase												=							cache_dir
            _lowerCAmelCase												=							keep_in_memory
            _lowerCAmelCase												=							streaming
            _lowerCAmelCase												=							num_proc
            _lowerCAmelCase												=							kwargs




      @abstractmethod
      def     lowercase__   (      self      :			Union[str, Any]  )    ->				Union[Dataset, IterableDataset]:
            pass













'''simple docstring'''






def        UpperCamelCase__				(		lowerCAmelCase							,     lowerCAmelCase  ):





      """simple docstring"""


      if not (isinstance(lowerCAmelCase							,     lowerCAmelCase  ) and isinstance(lowerCAmelCase							,     lowerCAmelCase  )):
            raise ValueError("""longest_common_substring() takes two strings for inputs"""  )

      _lowerCAmelCase												=							len(lowerCAmelCase  )
      _lowerCAmelCase												=							len(lowerCAmelCase  )

      _lowerCAmelCase												=							[[0] * (texta_length + 1) for _ in range(texta_length + 1  )]
      _lowerCAmelCase												=							0
      _lowerCAmelCase												=							0

      for i in range(1							,     texta_length + 1  ):
            for j in range(1							,     texta_length + 1  ):
                  if texta[i - 1] == texta[j - 1]:
                        _lowerCAmelCase												=							1 + dp[i - 1][j - 1]
                        if dp[i][j] > ans_length:
                              _lowerCAmelCase												=							i
                              _lowerCAmelCase												=							dp[i][j]

      return texta[ans_index - ans_length : ans_index]


if __name__ == "__main__":
      import doctest

      doctest.testmod()






