code: 
  
  
  
  
  
  
  from typing import TypeVar
  
  from .arrow_dataset import Dataset, _split_by_node_map_style_dataset
  from .iterable_dataset import IterableDataset, _split_by_node_iterable_dataset
  
  
  __snake_case							      =						TypeVar("""DatasetType""", Dataset, IterableDataset)
  
  
  def 						_A     (       SCREAMING_SNAKE_CASE__						:			DatasetType  ,						SCREAMING_SNAKE_CASE__						:			int  ,						SCREAMING_SNAKE_CASE__						:			int ):
  				if isinstance(SCREAMING_SNAKE_CASE__  ,						SCREAMING_SNAKE_CASE__ ):
  								return _split_by_node_map_style_dataset(SCREAMING_SNAKE_CASE__  ,						rank=SCREAMING_SNAKE_CASE__  ,						world_size=SCREAMING_SNAKE_CASE__ )
  				else:
  								return _split_by_node_iterable_dataset(SCREAMING_SNAKE_CASE__  ,						rank=SCREAMING_SNAKE_CASE__  ,						world_size=SCREAMING_SNAKE_CASE__ )
  
  
  
  
  
  
style_context: 
  
  
  
  
  
  
  from __future__ import annotations
  
  
  
  
  
  
  
  class     UpperCAmelCase_		:
  
  
  
        """simple docstring"""
        def __init__(       self					,       SCREAMING_SNAKE_CASE_				)       ->   None:
            UpperCamelCase :Tuple										=     value
            UpperCamelCase :Node | None										=     None
            UpperCamelCase :Node | None										=     None
  
  
  
  
  
  
  
  class     UpperCAmelCase_		:
  
  
  
        """simple docstring"""
        UpperCamelCase_       :      int
        def __init__(       self				)       ->   None:
            UpperCamelCase :List[Any]										=     0
        def 					UpperCAmelCase		(       self					,       SCREAMING_SNAKE_CASE_					,       SCREAMING_SNAKE_CASE_				)       ->   None:
            if node is None:
                return
  
            if path_sum == self.target:
                self.paths += 1
  
            if node.left:
                self.depth_first_search(node.left					,       path_sum + node.left.value				)
            if node.right:
                self.depth_first_search(node.right					,       path_sum + node.right.value				)
  
  
  
  
        def 					UpperCAmelCase		(       self					,       SCREAMING_SNAKE_CASE_					,       SCREAMING_SNAKE_CASE_ = None				)       ->   int:
            if node is None:
                return 0
            if target is not None:
                UpperCamelCase :Tuple										=     target
  
            self.depth_first_search(SCREAMING_SNAKE_CASE_					,       node.value				)
            self.path_sum(node.left				)
            self.path_sum(node.right				)
  
            return self.paths
  
  
  if __name__ == "__main__":
   import doctest
  
   doctest.testmod()
  
  
  
  
  
  