


"""simple docstring"""





import os
import tempfile
from pathlib import Path
from unittest import TestCase

import pyarrow as pa
import pytest

from datasets.arrow_dataset import Dataset
from datasets.arrow_reader import ArrowReader, BaseReader, FileInstructions, ReadInstruction, make_file_instructions
from datasets.info import DatasetInfo
from datasets.splits import NamedSplit, Split, SplitDict, SplitInfo

from .utils import assert_arrow_memory_doesnt_increase, assert_arrow_memory_increases

class  lowercase_  ( a_						):







      def 				_lowerCAmelCase       (      self :							Any		,  _lowercase :							Optional[Any]		,  _lowercase :							Any=False    ):
        lowerCAmelCase__				,		lowerCAmelCase__				,		lowerCAmelCase__    :    Optional[int]								=					(
            filename_skip_take["filename"],
            filename_skip_take["skip"] if "skip" in filename_skip_take else None,
            filename_skip_take["take"] if "take" in filename_skip_take else None,
        )
        open(os.path.join(_lowercase    )		,  "wb"    ).close()
        lowerCAmelCase__    :    int								=					pa.Table.from_pydict({"filename": [Path(_lowercase    ).name] * 1_0_0}    )
        if take == -1:
          lowerCAmelCase__    :    Tuple								=					len(_lowercase    ) - skip
        if skip is not None and take is not None:
          lowerCAmelCase__    :    Optional[int]								=					pa_table.slice(_lowercase		,  _lowercase    )
        return pa_table

class  lowercase_  ( a_						):







      def 				_lowerCAmelCase       (      self :							Union[str, Any]    ):
        lowerCAmelCase__    :    str								=					"my_name"
        lowerCAmelCase__    :    Tuple								=					SplitInfo(name="train"		,  num_examples=1_0_0    )
        lowerCAmelCase__    :    Optional[int]								=					SplitInfo(name="test"		,  num_examples=1_0_0    )
        lowerCAmelCase__    :    Optional[Any]								=					[train_info, test_info]
        lowerCAmelCase__    :    Optional[Any]								=					SplitDict()
        split_dict.add(_lowercase    )
        split_dict.add(_lowercase    )
        lowerCAmelCase__    :    Any								=					DatasetInfo(splits=_lowercase    )

        with tempfile.TemporaryDirectory() as tmp_dir:
          lowerCAmelCase__    :    List[Any]								=					ReaderTest(_lowercase		,  _lowercase    )

          lowerCAmelCase__    :    Union[str, Any]								=					"test[:33%]"
          lowerCAmelCase__    :    Dict								=					Dataset(**reader.read(_lowercase		,  _lowercase		,  _lowercase    )    )
          self.assertEqual(dset["filename"][0]		,  f"{name}-test"    )
          self.assertEqual(dset.num_rows		,  3_3    )
          self.assertEqual(dset.num_columns		,  1    )

          lowerCAmelCase__    :    int								=					["train", "test[:33%]"]
          lowerCAmelCase__    :    Union[str, Any]								=					[Split.TRAIN, ReadInstruction.from_spec("test[:33%]"    )]
          for instructions in [instructionsa, instructionsa]:
            lowerCAmelCase__    :    Optional[Any]								=					[reader.read(_lowercase		,  _lowercase		,  _lowercase    ) for instr in instructions]
            lowerCAmelCase__				,		lowerCAmelCase__    :    Union[str, Any]								=					(Dataset(**_lowercase    ) for dataset_kwargs in datasets_kwargs)
            self.assertEqual(train_dset["filename"][0]		,  f"{name}-train"    )
            self.assertEqual(train_dset.num_rows		,  1_0_0    )
            self.assertEqual(train_dset.num_columns		,  1    )
            self.assertIsInstance(train_dset.split		,  _lowercase    )
            self.assertEqual(str(train_dset.split    )		,  "train"    )
            self.assertEqual(test_dset["filename"][0]		,  f"{name}-test"    )
            self.assertEqual(test_dset.num_rows		,  3_3    )
            self.assertEqual(test_dset.num_columns		,  1    )
            self.assertIsInstance(test_dset.split		,  _lowercase    )
            self.assertEqual(str(test_dset.split    )		,  "test[:33%]"    )
            del train_dset, test_dset







      def 				_lowerCAmelCase       (      self :							Optional[int]    ):
        lowerCAmelCase__    :    int								=					"my_name"
        lowerCAmelCase__    :    List[str]								=					SplitInfo(name="train"		,  num_examples=1_0_0_0		,  shard_lengths=[1_0_0] * 1_0    )
        lowerCAmelCase__    :    Optional[Any]								=					[train_info]
        lowerCAmelCase__    :    Dict								=					SplitDict()
        split_dict.add(_lowercase    )
        lowerCAmelCase__    :    List[str]								=					DatasetInfo(splits=_lowercase    )

        with tempfile.TemporaryDirectory() as tmp_dir:
          lowerCAmelCase__    :    str								=					ReaderTest(_lowercase		,  _lowercase    )

          lowerCAmelCase__    :    Any								=					"train[:33%]"
          lowerCAmelCase__    :    Optional[int]								=					Dataset(**reader.read(_lowercase		,  _lowercase		,  _lowercase    )    )
          self.assertEqual(dset["filename"][0]		,  f"{name}-train-00000-of-00010"    )
          self.assertEqual(dset["filename"][-1]		,  f"{name}-train-00003-of-00010"    )
          self.assertEqual(dset.num_rows		,  3_3_0    )
          self.assertEqual(dset.num_columns		,  1    )







      def 				_lowerCAmelCase       (      self :							Any    ):
        lowerCAmelCase__    :    Union[str, Any]								=					SplitInfo(name="train"		,  num_examples=1_0_0    )
        lowerCAmelCase__    :    Optional[int]								=					SplitInfo(name="test"		,  num_examples=1_0_0    )
        lowerCAmelCase__    :    List[str]								=					SplitDict()
        split_dict.add(_lowercase    )
        split_dict.add(_lowercase    )
        lowerCAmelCase__    :    Tuple								=					DatasetInfo(splits=_lowercase    )

        with tempfile.TemporaryDirectory() as tmp_dir:
          lowerCAmelCase__    :    List[Any]								=					ReaderTest(_lowercase		,  _lowercase    )

          lowerCAmelCase__    :    Optional[Any]								=					[
              {"filename": os.path.join(_lowercase		,  "train"    )},
              {"filename": os.path.join(_lowercase		,  "test"    ), "skip": 1_0, "take": 1_0},
          ]
          lowerCAmelCase__    :    List[str]								=					Dataset(**reader.read_files(_lowercase		,  original_instructions="train+test[10:20]"    )    )
          self.assertEqual(dset.num_rows		,  1_1_0    )
          self.assertEqual(dset.num_columns		,  1    )
          del dset





@pytest.mark.parametrize("in_memory"				,	[False, True]				)
def     lowercase__	(  lowerCamelCase     :  Optional[Any]				,	lowerCamelCase     :  Tuple				,	lowerCamelCase     :  Optional[Any]				)					->     int:
  lowerCAmelCase__    :    Optional[int]								=					arrow_file
  with assert_arrow_memory_increases() if in_memory else assert_arrow_memory_doesnt_increase():
    lowerCAmelCase__    :    int								=					ArrowReader.read_table(lowerCamelCase				,	in_memory=lowerCamelCase				)
  assert table.shape == dataset.data.shape
  assert set(table.column_names				) == set(dataset.data.column_names				)
  assert dict(table.to_pydict()				) == dict(dataset.data.to_pydict()				)  # to_pydict returns OrderedDict





@pytest.mark.parametrize("in_memory"				,	[False, True]				)
def     lowercase__	(  lowerCamelCase     :  Dict				,	lowerCamelCase     :  Union[str, Any]				,	lowerCamelCase     :  Any				)					->     Tuple:
  lowerCAmelCase__    :    Dict								=					arrow_file
  lowerCAmelCase__    :    Union[str, Any]								=					ArrowReader(""				,	lowerCamelCase				)
  with assert_arrow_memory_increases() if in_memory else assert_arrow_memory_doesnt_increase():
    lowerCAmelCase__    :    Union[str, Any]								=					reader.read_files([{"filename": filename}]				,	in_memory=lowerCamelCase				)
  assert dataset_kwargs.keys() == {"arrow_table", "info", "split"}
  lowerCAmelCase__    :    List[str]								=					dataset_kwargs["arrow_table"]
  assert table.shape == dataset.data.shape
  assert set(table.column_names				) == set(dataset.data.column_names				)
  assert dict(table.to_pydict()				) == dict(dataset.data.to_pydict()				)  # to_pydict returns OrderedDict





def     lowercase__	(  )					->     List[str]:
  assert ReadInstruction("train"				,	to=1_0				,	unit="abs"				).to_spec() == "train[:10]"
  assert ReadInstruction("train"				,	from_=-8_0				,	to=1_0				,	unit="%"				).to_spec() == "train[-80%:10%]"

  lowerCAmelCase__    :    str								=					"train+test"
  assert ReadInstruction.from_spec(lowerCamelCase				).to_spec() == spec_train_test

  lowerCAmelCase__    :    int								=					"train[2:10]"
  assert ReadInstruction.from_spec(lowerCamelCase				).to_spec() == spec_train_abs

  lowerCAmelCase__    :    int								=					"train[15%:-20%]"
  assert ReadInstruction.from_spec(lowerCamelCase				).to_spec() == spec_train_pct

  lowerCAmelCase__    :    Optional[int]								=					"train[:10%](closest)"
  assert ReadInstruction.from_spec(lowerCamelCase				).to_spec() == "train[:10%]"

  lowerCAmelCase__    :    Dict								=					"train[:10%](pct1_dropremainder)"
  assert ReadInstruction.from_spec(lowerCamelCase				).to_spec() == spec_train_pct_rounding

  lowerCAmelCase__    :    Dict								=					"train[:10%](pct1_dropremainder)+test[-10%:](pct1_dropremainder)"
  assert ReadInstruction.from_spec(lowerCamelCase				).to_spec() == spec_train_test_pct_rounding





def     lowercase__	(  )					->     Optional[int]:
  lowerCAmelCase__    :    Dict								=					"dummy"
  lowerCAmelCase__    :    Dict								=					[SplitInfo(name="train"				,	num_examples=1_0_0				)]
  lowerCAmelCase__    :    List[Any]								=					"train[:33%]"
  lowerCAmelCase__    :    Union[str, Any]								=					"arrow"
  lowerCAmelCase__    :    Any								=					"prefix"

  lowerCAmelCase__    :    Dict								=					make_file_instructions(lowerCamelCase				,	lowerCamelCase				,	lowerCamelCase				,	lowerCamelCase				,	lowerCamelCase				)
  assert isinstance(lowerCamelCase				,	lowerCamelCase				)
  assert file_instructions.num_examples == 3_3
  assert file_instructions.file_instructions == [
      {"filename": os.path.join(lowerCamelCase				,	F"{name}-train.arrow"				), "skip": 0, "take": 3_3}
  ]

  lowerCAmelCase__    :    Union[str, Any]								=					[SplitInfo(name="train"				,	num_examples=1_0_0				,	shard_lengths=[1_0] * 1_0				)]
  lowerCAmelCase__    :    Union[str, Any]								=					make_file_instructions(lowerCamelCase				,	lowerCamelCase				,	lowerCamelCase				,	lowerCamelCase				,	lowerCamelCase				)
  assert isinstance(lowerCamelCase				,	lowerCamelCase				)
  assert file_instructions.num_examples == 3_3
  assert file_instructions.file_instructions == [
      {"filename": os.path.join(lowerCamelCase				,	F"{name}-train-00000-of-00010.arrow"				), "skip": 0, "take": -1},
      {"filename": os.path.join(lowerCamelCase				,	F"{name}-train-00001-of-00010.arrow"				), "skip": 0, "take": -1},
      {"filename": os.path.join(lowerCamelCase				,	F"{name}-train-00002-of-00010.arrow"				), "skip": 0, "take": -1},
      {"filename": os.path.join(lowerCamelCase				,	F"{name}-train-00003-of-00010.arrow"				), "skip": 0, "take": 3},
  ]







@pytest.mark.parametrize("name, expected_exception"				,	[(None, TypeError), ("", ValueError)]				)
def     lowercase__	(  lowerCamelCase     :  str				,	lowerCamelCase     :  Any				)					->     Optional[Any]:
  lowerCAmelCase__    :    Any								=					[SplitInfo(name="train"				,	num_examples=1_0_0				)]
  lowerCAmelCase__    :    List[Any]								=					"train"
  lowerCAmelCase__    :    Any								=					"arrow"
  lowerCAmelCase__    :    List[Any]								=					"prefix_path"
  with pytest.raises(lowerCamelCase				):
    lowerCAmelCase__    :    Optional[int]								=					make_file_instructions(lowerCamelCase				,	lowerCamelCase				,	lowerCamelCase				,	lowerCamelCase				,	lowerCamelCase				)




"""simple docstring"""





from __future__ import annotations





def     lowercase__	(  lowerCamelCase     :  list				,	lowerCamelCase     :  list				)					->     list:
  lowerCAmelCase__    :    Dict								=					[None] * (len(lowerCamelCase				) + len(lowerCamelCase				))

  lowerCAmelCase__    :    Optional[Any]								=					0  # pointer to current index for left Half
  lowerCAmelCase__    :    Any								=					0  # pointer to current index for the right Half
  lowerCAmelCase__    :    Dict								=					0  # pointer to current index for the sorted array Half

  while pointera < len(lowerCamelCase				) and pointera < len(lowerCamelCase				):
    if left_half[pointera] < right_half[pointera]:
      lowerCAmelCase__    :    Tuple								=					left_half[pointera]
      pointera += 1
      index += 1
    else:
      lowerCAmelCase__    :    int								=					right_half[pointera]
      pointera += 1
      index += 1
  while pointera < len(lowerCamelCase				):
    lowerCAmelCase__    :    Tuple								=					left_half[pointera]
    pointera += 1
    index += 1

  while pointera < len(lowerCamelCase				):
    lowerCAmelCase__    :    Optional[int]								=					right_half[pointera]
    pointera += 1
    index += 1

  return sorted_array





def     lowercase__	(  lowerCamelCase     :  list				)					->     list:
  if len(lowerCamelCase				) <= 1:
    return array
  # the actual formula to calculate the middle element = left + (right - left) // 2
  # this avoids integer overflow in case of large N
  lowerCAmelCase__    :    Optional[int]								=					0 + (len(lowerCamelCase				) - 0) // 2

  # Split the array into halves till the array length becomes equal to One
  # merge the arrays of single length returned by mergeSort function and
  # pass them into the merge arrays function which merges the array
  lowerCAmelCase__    :    Union[str, Any]								=					array[:middle]
  lowerCAmelCase__    :    List[str]								=					array[middle:]

  return merge(merge_sort(lowerCamelCase				)				,	merge_sort(lowerCamelCase				)				)


if __name__ == "__main__":
   import doctest

   doctest.testmod()
