'''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 _lowerCAmelCase			(	UpperCAmelCase__					):







      def      lowerCamelCase__      (  self  ,    lowercase  ,    lowercase=False     ):
        lowercase				:							Union[str, Any]									=   (
            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()
        lowercase				:							int									=   pa.Table.from_pydict({'''filename''': [Path(__lowercase     ).name] * 100}     )
        if take == -1:
          lowercase				:							Tuple									=   len(__lowercase     ) - skip
        if skip is not None and take is not None:
          lowercase				:							List[str]									=   pa_table.slice(__lowercase  ,    __lowercase     )
        return pa_table





class _lowerCAmelCase			(	UpperCAmelCase__					):







      def      lowerCamelCase__      (  self     ):
        lowercase				:							Union[str, Any]									=   '''my_name'''
        lowercase				:							int									=   SplitInfo(name='''train'''  ,    num_examples=100     )
        lowercase				:							Union[str, Any]									=   SplitInfo(name='''test'''  ,    num_examples=100     )
        lowercase				:							int									=   [train_info, test_info]
        lowercase				:							Optional[int]									=   SplitDict()
        split_dict.add(__lowercase     )
        split_dict.add(__lowercase     )
        lowercase				:							Any									=   DatasetInfo(splits=__lowercase     )

        with tempfile.TemporaryDirectory() as tmp_dir:
          lowercase				:							Tuple									=   ReaderTest(__lowercase  ,    __lowercase     )

          lowercase				:							List[Any]									=   '''test[:33%]'''
          lowercase				:							Dict									=   Dataset(**reader.read(__lowercase  ,    __lowercase  ,    __lowercase     )     )
          self.assertEqual(dset['''filename'''][0]  ,    F"""{name}-test"""     )
          self.assertEqual(dset.num_rows  ,    33     )
          self.assertEqual(dset.num_columns  ,    1     )

          lowercase				:							Optional[int]									=   ['''train''', '''test[:33%]''']
          lowercase				:							Optional[int]									=   [Split.TRAIN, ReadInstruction.from_spec('''test[:33%]'''     )]
          for instructions in [instructionsa, instructionsa]:
            lowercase				:							int									=   [reader.read(__lowercase  ,    __lowercase  ,    __lowercase     ) for instr in instructions]
            lowercase				:							Tuple									=   (Dataset(**__lowercase     ) for dataset_kwargs in datasets_kwargs)
            self.assertEqual(train_dset['''filename'''][0]  ,    F"""{name}-train"""     )
            self.assertEqual(train_dset.num_rows  ,    100     )
            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  ,    33     )
            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     ):
        lowercase				:							Optional[int]									=   '''my_name'''
        lowercase				:							Dict									=   SplitInfo(name='''train'''  ,    num_examples=1000  ,    shard_lengths=[100] * 10     )
        lowercase				:							int									=   [train_info]
        lowercase				:							int									=   SplitDict()
        split_dict.add(__lowercase     )
        lowercase				:							Optional[Any]									=   DatasetInfo(splits=__lowercase     )

        with tempfile.TemporaryDirectory() as tmp_dir:
          lowercase				:							Dict									=   ReaderTest(__lowercase  ,    __lowercase     )

          lowercase				:							Union[str, Any]									=   '''train[:33%]'''
          lowercase				:							List[Any]									=   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  ,    330     )
          self.assertEqual(dset.num_columns  ,    1     )







      def      lowerCamelCase__      (  self     ):
        lowercase				:							List[Any]									=   SplitInfo(name='''train'''  ,    num_examples=100     )
        lowercase				:							List[str]									=   SplitInfo(name='''test'''  ,    num_examples=100     )
        lowercase				:							Dict									=   SplitDict()
        split_dict.add(__lowercase     )
        split_dict.add(__lowercase     )
        lowercase				:							Union[str, Any]									=   DatasetInfo(splits=__lowercase     )

        with tempfile.TemporaryDirectory() as tmp_dir:
          lowercase				:							str									=   ReaderTest(__lowercase  ,    __lowercase     )

          lowercase				:							List[str]									=   [
              {'''filename''': os.path.join(__lowercase  ,    '''train'''     )},
              {'''filename''': os.path.join(__lowercase  ,    '''test'''     ), '''skip''': 10, '''take''': 10},
          ]
          lowercase				:							List[str]									=   Dataset(**reader.read_files(__lowercase  ,    original_instructions='''train+test[10:20]'''     )     )
          self.assertEqual(dset.num_rows  ,    110     )
          self.assertEqual(dset.num_columns  ,    1     )
          del dset







@pytest.mark.parametrize('''in_memory''' ,   [False, True]			)
def 				__UpperCamelCase (					__UpperCAmelCase  :					str ,   __UpperCAmelCase  :					str ,   __UpperCAmelCase  :					Optional[int]			)							->	List[str]:
  lowercase				:							Optional[int]									=   arrow_file
  with assert_arrow_memory_increases() if in_memory else assert_arrow_memory_doesnt_increase():
    lowercase				:							List[str]									=   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 				__UpperCamelCase (					__UpperCAmelCase  :					Union[str, Any] ,   __UpperCAmelCase  :					Tuple ,   __UpperCAmelCase  :					List[Any]			)							->	List[Any]:
  lowercase				:							Optional[Any]									=   arrow_file
  lowercase				:							Union[str, Any]									=   ArrowReader('''''' ,   lowerCAmelCase_			)
  with assert_arrow_memory_increases() if in_memory else assert_arrow_memory_doesnt_increase():
    lowercase				:							str									=   reader.read_files([{'''filename''': filename}] ,   in_memory=lowerCAmelCase_			)
  assert dataset_kwargs.keys() == {"arrow_table", "info", "split"}
  lowercase				:							Optional[int]									=   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 				__UpperCamelCase (					)							->	Any:
  assert ReadInstruction('''train''' ,   to=10 ,   unit='''abs'''			).to_spec() == "train[:10]"
  assert ReadInstruction('''train''' ,   from_=-80 ,   to=10 ,   unit='''%'''			).to_spec() == "train[-80%:10%]"

  lowercase				:							Optional[int]									=   '''train+test'''
  assert ReadInstruction.from_spec(lowerCAmelCase_			).to_spec() == spec_train_test

  lowercase				:							Union[str, Any]									=   '''train[2:10]'''
  assert ReadInstruction.from_spec(lowerCAmelCase_			).to_spec() == spec_train_abs

  lowercase				:							Any									=   '''train[15%:-20%]'''
  assert ReadInstruction.from_spec(lowerCAmelCase_			).to_spec() == spec_train_pct

  lowercase				:							int									=   '''train[:10%](closest)'''
  assert ReadInstruction.from_spec(lowerCAmelCase_			).to_spec() == "train[:10%]"

  lowercase				:							str									=   '''train[:10%](pct1_dropremainder)'''
  assert ReadInstruction.from_spec(lowerCAmelCase_			).to_spec() == spec_train_pct_rounding

  lowercase				:							List[str]									=   '''train[:10%](pct1_dropremainder)+test[-10%:](pct1_dropremainder)'''
  assert ReadInstruction.from_spec(lowerCAmelCase_			).to_spec() == spec_train_test_pct_rounding







def 				__UpperCamelCase (					)							->	Optional[Any]:
  lowercase				:							List[Any]									=   '''dummy'''
  lowercase				:							Optional[Any]									=   [SplitInfo(name='''train''' ,   num_examples=100			)]
  lowercase				:							int									=   '''train[:33%]'''
  lowercase				:							List[Any]									=   '''arrow'''
  lowercase				:							str									=   '''prefix'''

  lowercase				:							Any									=   make_file_instructions(lowerCAmelCase_ ,   lowerCAmelCase_ ,   lowerCAmelCase_ ,   lowerCAmelCase_ ,   lowerCAmelCase_			)
  assert isinstance(lowerCAmelCase_ ,   lowerCAmelCase_			)
  assert file_instructions.num_examples == 33
  assert file_instructions.file_instructions == [
      {"filename": os.path.join(lowerCAmelCase_ ,   f"""{name}-train.arrow"""			), "skip": 0, "take": 33}
  ]

  lowercase				:							Any									=   [SplitInfo(name='''train''' ,   num_examples=100 ,   shard_lengths=[10] * 10			)]
  lowercase				:							str									=   make_file_instructions(lowerCAmelCase_ ,   lowerCAmelCase_ ,   lowerCAmelCase_ ,   lowerCAmelCase_ ,   lowerCAmelCase_			)
  assert isinstance(lowerCAmelCase_ ,   lowerCAmelCase_			)
  assert file_instructions.num_examples == 33
  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 				__UpperCamelCase (					__UpperCAmelCase  :					str ,   __UpperCAmelCase  :					Any			)							->	Dict:
  lowercase				:							Optional[Any]									=   [SplitInfo(name='''train''' ,   num_examples=100			)]
  lowercase				:							List[Any]									=   '''train'''
  lowercase				:							str									=   '''arrow'''
  lowercase				:							Optional[Any]									=   '''prefix_path'''
  with pytest.raises(lowerCAmelCase_			):
    lowercase				:							List[str]									=   make_file_instructions(lowerCAmelCase_ ,   lowerCAmelCase_ ,   lowerCAmelCase_ ,   lowerCAmelCase_ ,   lowerCAmelCase_			)



def       lowerCAmelCase			(		lowerCAmelCase_			, lowerCAmelCase_			)->			set:
				assert isinstance(lowerCAmelCase_			, lowerCAmelCase_			), f"""The input value of [set_a={set_a}] is not a set"""
				assert isinstance(lowerCAmelCase_			, lowerCAmelCase_			), f"""The input value of [set_b={set_b}] is not a set"""

				return {a + b for a in set_a for b in set_b}


if __name__ == "__main__":
						from doctest import testmod

						testmod()