
'''simple docstring'''
import pytest

from datasets.parallel import ParallelBackendConfig, parallel_backend
from datasets.utils.py_utils import map_nested

from .utils import require_dill_gt_0_3_2, require_joblibspark, require_not_windows







def        A_     (						__SCREAMING_SNAKE_CASE						:  str )				->       str:  # picklable for multiprocessing





  """simple docstring"""

  return i + 1







@require_dill_gt_0_3_2
@require_joblibspark
@require_not_windows
def        A_     (						)				->       str:





  """simple docstring"""

  with parallel_backend("""spark""" ):
    assert ParallelBackendConfig.backend_name == "spark"

  __A		:     List[Any]												=		[1, 2, 3]
  with pytest.raises(__snake_case ):
    with parallel_backend("""unsupported backend""" ):
      map_nested(__snake_case			,     __snake_case			,     num_proc=2 )

  with pytest.raises(__snake_case ):
    with parallel_backend("""unsupported backend""" ):
      map_nested(__snake_case			,     __snake_case			,     num_proc=-1 )







@require_dill_gt_0_3_2
@require_joblibspark
@require_not_windows
@pytest.mark.parametrize("""num_proc"""			,     [2, -1] )
def        A_     (						__SCREAMING_SNAKE_CASE						:  Dict )				->       int:





  """simple docstring"""

  __A		:     Optional[Any]												=		[1, 2]
  __A		:     Any												=		{"""a""": 1, """b""": 2}
  __A		:     str												=		{"""a""": [1, 2], """b""": [3, 4]}
  __A		:     List[str]												=		{"""a""": {"""1""": 1}, """b""": 2}
  __A		:     Optional[Any]												=		{"""a""": 1, """b""": 2, """c""": 3, """d""": 4}
  __A		:     Optional[Any]												=		[2, 3]
  __A		:     Optional[int]												=		{"""a""": 2, """b""": 3}
  __A		:     List[str]												=		{"""a""": [2, 3], """b""": [4, 5]}
  __A		:     Optional[Any]												=		{"""a""": {"""1""": 2}, """b""": 3}
  __A		:     List[str]												=		{"""a""": 2, """b""": 3, """c""": 4, """d""": 5}

  with parallel_backend("""spark""" ):
    assert map_nested(__snake_case			,     __snake_case			,     num_proc=__snake_case ) == expected_map_nested_sa
    assert map_nested(__snake_case			,     __snake_case			,     num_proc=__snake_case ) == expected_map_nested_sa
    assert map_nested(__snake_case			,     __snake_case			,     num_proc=__snake_case ) == expected_map_nested_sa
    assert map_nested(__snake_case			,     __snake_case			,     num_proc=__snake_case ) == expected_map_nested_sa
    assert map_nested(__snake_case			,     __snake_case			,     num_proc=__snake_case ) == expected_map_nested_sa





'''simple docstring'''
def        A_     (						__SCREAMING_SNAKE_CASE						:  list			,     __SCREAMING_SNAKE_CASE						:  list			,     __SCREAMING_SNAKE_CASE						:  int			,     __SCREAMING_SNAKE_CASE						:  int			,     __SCREAMING_SNAKE_CASE						:  int )				->       int:





  """simple docstring"""

  if index == number_of_items:
    return 0
  __A		:     List[Any]												=		0
  __A		:     Union[str, Any]												=		0
  __A		:     List[Any]												=		knapsack(__SCREAMING_SNAKE_CASE			,     __SCREAMING_SNAKE_CASE			,     __SCREAMING_SNAKE_CASE			,     __SCREAMING_SNAKE_CASE			,     index + 1 )
  if weights[index] <= max_weight:
    __A		:     Tuple												=		values[index] + knapsack(
        __SCREAMING_SNAKE_CASE			,     __SCREAMING_SNAKE_CASE			,     __SCREAMING_SNAKE_CASE			,     max_weight - weights[index]			,     index + 1 )
  return max(__SCREAMING_SNAKE_CASE			,     __SCREAMING_SNAKE_CASE )


if __name__ == "__main__":
     import doctest

     doctest.testmod()



