"""simple docstring"""






from typing import Any





class 					_A		:

      def __init__(		self						,			__lowerCAmelCase		):







            """simple docstring"""



            lowercase								=      data
            lowercase								=      None







      def __repr__(		self		):







            """simple docstring"""



            return f'Node({self.data})'






class 					_A		:

      def __init__(		self		):







            """simple docstring"""



            lowercase								=      None

      def __iter__(		self		):







            """simple docstring"""



            lowercase								=      self.head
            while node:
                  yield node.data
                  lowercase								=      node.next

      def __len__(		self		):







            """simple docstring"""



            return sum(1 for _ in self		)

      def __repr__(		self		):







            """simple docstring"""



            return "->".join([str(__lowerCAmelCase		) for item in self]		)

      def __getitem__(		self						,			__lowerCAmelCase		):







            """simple docstring"""



            if not 0 <= index < len(self		):
                  raise ValueError("""list index out of range."""		)
            for i, node in enumerate(self		):
                  if i == index:
                        return node
            return None

      def __setitem__(		self						,			__lowerCAmelCase						,			__lowerCAmelCase		):







            """simple docstring"""



            if not 0 <= index < len(self		):
                  raise ValueError("""list index out of range."""		)
            lowercase								=      self.head
            for _ in range(__lowerCAmelCase		):
                  lowercase								=      current.next
            lowercase								=      data

      def 							A__			(		self						,			__lowerCAmelCase		):







            """simple docstring"""



            self.insert_nth(len(self		)						,			__lowerCAmelCase		)

      def 							A__			(		self						,			__lowerCAmelCase		):







            """simple docstring"""



            self.insert_nth(0						,			__lowerCAmelCase		)

      def 							A__			(		self						,			__lowerCAmelCase						,			__lowerCAmelCase		):







            """simple docstring"""



            if not 0 <= index <= len(self		):
                  raise IndexError("""list index out of range"""		)
            lowercase								=      Node(__lowerCAmelCase		)
            if self.head is None:
                  lowercase								=      new_node
            elif index == 0:
                  lowercase								=      self.head  # link new_node to head
                  lowercase								=      new_node
            else:
                  lowercase								=      self.head
                  for _ in range(index - 1		):
                        lowercase								=      temp.next
                  lowercase								=      temp.next
                  lowercase								=      new_node

      def 							A__			(		self		):  # print every node data







            """simple docstring"""



            print(self		)

      def 							A__			(		self		):







            """simple docstring"""



            return self.delete_nth(0		)

      def 							A__			(		self		):  # delete from tail







            """simple docstring"""



            return self.delete_nth(len(self		) - 1		)

      def 							A__			(		self						,			__lowerCAmelCase = 0		):







            """simple docstring"""



            if not 0 <= index <= len(self		) - 1:  # test if index is valid
                  raise IndexError("""List index out of range."""		)
            lowercase								=      self.head  # default first node
            if index == 0:
                  lowercase								=      self.head.next
            else:
                  lowercase								=      self.head
                  for _ in range(index - 1		):
                        lowercase								=      temp.next
                  lowercase								=      temp.next
                  lowercase								=      temp.next.next
            return delete_node.data

      def 							A__			(		self		):







            """simple docstring"""



            return self.head is None







      def 							A__			(		self		):







            """simple docstring"""



            lowercase								=      None
            lowercase								=      self.head

            while current:
                  # Store the current node's next node.
                  lowercase								=      current.next
                  # Make the current node's next point backwards
                  lowercase								=      prev
                  # Make the previous node be the current node
                  lowercase								=      current
                  # Make the current node the next node (to progress iteration)
                  lowercase								=      next_node
            # Return prev in order to put the head at the end
            lowercase								=      prev






def      UpperCAmelCase__			(							)					->       None:
      '''simple docstring'''


      lowercase								=      LinkedList()
      assert linked_list.is_empty() is True
      assert str(lowerCAmelCase__						) == ""

      try:
            linked_list.delete_head()
            raise AssertionError  # This should not happen.
      except IndexError:
            assert True  # This should happen.

      try:
            linked_list.delete_tail()
            raise AssertionError  # This should not happen.
      except IndexError:
            assert True  # This should happen.

      for i in range(1_0						):
            assert len(lowerCAmelCase__						) == i
            linked_list.insert_nth(lowerCAmelCase__   ,						i + 1						)
      assert str(lowerCAmelCase__						) == "->".join(str(lowerCAmelCase__						) for i in range(1   ,						1_1						)						)

      linked_list.insert_head(0						)
      linked_list.insert_tail(1_1						)
      assert str(lowerCAmelCase__						) == "->".join(str(lowerCAmelCase__						) for i in range(0   ,						1_2						)						)

      assert linked_list.delete_head() == 0
      assert linked_list.delete_nth(9						) == 1_0
      assert linked_list.delete_tail() == 1_1
      assert len(lowerCAmelCase__						) == 9
      assert str(lowerCAmelCase__						) == "->".join(str(lowerCAmelCase__						) for i in range(1   ,						1_0						)						)

      assert all(linked_list[i] == i + 1 for i in range(0   ,						9						)						) is True

      for i in range(0   ,						9						):
            lowercase								=      -i
      assert all(linked_list[i] == -i for i in range(0   ,						9						)						) is True

      linked_list.reverse()
      assert str(lowerCAmelCase__						) == "->".join(str(lowerCAmelCase__						) for i in range(-8   ,						1						)						)


def      UpperCAmelCase__			(							)					->       None:
      '''simple docstring'''


      lowercase								=      [
          -9,
          1_0_0,
          Node(7_7_3_4_5_1_1_2						),
          """dlrow olleH""",
          7,
          5_5_5_5,
          0,
          -192.55_555,
          """Hello, world!""",
          77.9,
          Node(1_0						),
          None,
          None,
          12.20,
      ]
      lowercase								=      LinkedList()

      for i in test_input:
            linked_list.insert_tail(lowerCAmelCase__						)

      # Check if it's empty or not
      assert linked_list.is_empty() is False
      assert (
          str(lowerCAmelCase__						) == "-9->100->Node(77345112)->dlrow olleH->7->5555->0->"
          "-192.55555->Hello, world!->77.9->Node(10)->None->None->12.2"
      )

      # Delete the head
      lowercase								=      linked_list.delete_head()
      assert result == -9
      assert (
          str(lowerCAmelCase__						) == "100->Node(77345112)->dlrow olleH->7->5555->0->-192.55555->"
          "Hello, world!->77.9->Node(10)->None->None->12.2"
      )

      # Delete the tail
      lowercase								=      linked_list.delete_tail()
      assert result == 12.2
      assert (
          str(lowerCAmelCase__						) == "100->Node(77345112)->dlrow olleH->7->5555->0->-192.55555->"
          "Hello, world!->77.9->Node(10)->None->None"
      )

      # Delete a node in specific location in linked list
      lowercase								=      linked_list.delete_nth(1_0						)
      assert result is None
      assert (
          str(lowerCAmelCase__						) == "100->Node(77345112)->dlrow olleH->7->5555->0->-192.55555->"
          "Hello, world!->77.9->Node(10)->None"
      )

      # Add a Node instance to its head
      linked_list.insert_head(Node("""Hello again, world!"""						)						)
      assert (
          str(lowerCAmelCase__						)
          == "Node(Hello again, world!)->100->Node(77345112)->dlrow olleH->"
          "7->5555->0->-192.55555->Hello, world!->77.9->Node(10)->None"
      )

      # Add None to its tail
      linked_list.insert_tail(lowerCAmelCase__						)
      assert (
          str(lowerCAmelCase__						)
          == "Node(Hello again, world!)->100->Node(77345112)->dlrow olleH->"
          "7->5555->0->-192.55555->Hello, world!->77.9->Node(10)->None->None"
      )

      # Reverse the linked list
      linked_list.reverse()
      assert (
          str(lowerCAmelCase__						)
          == "None->None->Node(10)->77.9->Hello, world!->-192.55555->0->5555->"
          "7->dlrow olleH->Node(77345112)->100->Node(Hello again, world!)"
      )


def      UpperCAmelCase__			(							)					->       Optional[int]:
      '''simple docstring'''


      from doctest import testmod

      testmod()

      lowercase								=      LinkedList()
      linked_list.insert_head(input("""Inserting 1st at head """						).strip()						)
      linked_list.insert_head(input("""Inserting 2nd at head """						).strip()						)
      print("""\nPrint list:"""						)
      linked_list.print_list()
      linked_list.insert_tail(input("""\nInserting 1st at tail """						).strip()						)
      linked_list.insert_tail(input("""Inserting 2nd at tail """						).strip()						)
      print("""\nPrint list:"""						)
      linked_list.print_list()
      print("""\nDelete head"""						)
      linked_list.delete_head()
      print("""Delete tail"""						)
      linked_list.delete_tail()
      print("""\nPrint list:"""						)
      linked_list.print_list()
      print("""\nReverse linked list"""						)
      linked_list.reverse()
      print("""\nPrint list:"""						)
      linked_list.print_list()
      print("""\nString representation of linked list:"""						)
      print(lowerCAmelCase__						)
      print("""\nReading/changing Node data using indexing:"""						)
      print(f'Element at Position 1: {linked_list[1]}'						)
      lowercase								=      input("""Enter New Value: """						).strip()
      print("""New list:"""						)
      print(lowerCAmelCase__						)
      print(f'length of linked_list is : {len(lowerCAmelCase__						)}'						)


if __name__ == "__main__":
       main()




"""simple docstring"""






import multiprocessing
from typing import TYPE_CHECKING, Optional, Union

from .. import Dataset, Features, config
from ..formatting import query_table
from ..packaged_modules.sql.sql import Sql
from ..utils import logging
from .abc import AbstractDatasetInputStream


if TYPE_CHECKING:
       import sqlitea

       import sqlalchemy





class 					_A		(			lowerCAmelCase      ):

      def __init__(		self						,			__lowerCAmelCase						,			__lowerCAmelCase						,			__lowerCAmelCase = None						,			__lowerCAmelCase = None						,			__lowerCAmelCase = False						,			**__lowerCAmelCase						,			):







            """simple docstring"""



            super().__init__(features=__lowerCAmelCase						,			cache_dir=__lowerCAmelCase						,			keep_in_memory=__lowerCAmelCase						,			**__lowerCAmelCase		)
            lowercase								=      Sql(
                cache_dir=__lowerCAmelCase						,			features=__lowerCAmelCase						,			sql=__lowerCAmelCase						,			con=__lowerCAmelCase						,			**__lowerCAmelCase						,			)







      def 							A__			(		self		):







            """simple docstring"""



            lowercase								=      None
            lowercase								=      None
            lowercase								=      None
            lowercase								=      None

            self.builder.download_and_prepare(
                download_config=__lowerCAmelCase						,			download_mode=__lowerCAmelCase						,			verification_mode=__lowerCAmelCase						,			base_path=__lowerCAmelCase						,			)

            # Build dataset for splits
            lowercase								=      self.builder.as_dataset(
                split="""train"""						,			verification_mode=__lowerCAmelCase						,			in_memory=self.keep_in_memory		)
            return dataset






class 					_A		:

      def __init__(		self						,			__lowerCAmelCase						,			__lowerCAmelCase						,			__lowerCAmelCase						,			__lowerCAmelCase = None						,			__lowerCAmelCase = None						,			**__lowerCAmelCase						,			):







            """simple docstring"""



            if num_proc is not None and num_proc <= 0:
                  raise ValueError(f'num_proc {num_proc} must be an integer > 0.'		)

            lowercase								=      dataset
            lowercase								=      name
            lowercase								=      con
            lowercase								=      batch_size if batch_size else config.DEFAULT_MAX_BATCH_SIZE
            lowercase								=      num_proc
            lowercase								=      to_sql_kwargs

      def 							A__			(		self		):







            """simple docstring"""



            lowercase								=      self.to_sql_kwargs.pop("""sql"""						,			__lowerCAmelCase		)
            lowercase								=      self.to_sql_kwargs.pop("""con"""						,			__lowerCAmelCase		)
            lowercase								=      self.to_sql_kwargs.pop("""index"""						,			__lowerCAmelCase		)

            lowercase								=      self._write(index=__lowerCAmelCase						,			**self.to_sql_kwargs		)
            return written

      def 							A__			(		self						,			__lowerCAmelCase		):







            """simple docstring"""



            lowercase				,				lowercase				,				lowercase								=      args
            lowercase								=      {**to_sql_kwargs, """if_exists""": """append"""} if offset > 0 else to_sql_kwargs
            lowercase								=      query_table(
                table=self.dataset.data						,			key=slice(__lowerCAmelCase						,			offset + self.batch_size		)						,			indices=self.dataset._indices						,			)
            lowercase								=      batch.to_pandas()
            lowercase								=      df.to_sql(self.name						,			self.con						,			index=__lowerCAmelCase						,			**__lowerCAmelCase		)
            return num_rows or len(__lowerCAmelCase		)







      def 							A__			(		self						,			__lowerCAmelCase						,			**__lowerCAmelCase		):







            """simple docstring"""



            lowercase								=      0

            if self.num_proc is None or self.num_proc == 1:
                  for offset in logging.tqdm(
                      range(0						,			len(self.dataset		)						,			self.batch_size		)						,			unit="""ba"""						,			disable=not logging.is_progress_bar_enabled()						,			desc="""Creating SQL from Arrow format"""						,			):
                        written += self._batch_sql((offset, index, to_sql_kwargs)		)
            else:
                  lowercase				,				lowercase								=      len(self.dataset		), self.batch_size
                  with multiprocessing.Pool(self.num_proc		) as pool:
                        for num_rows in logging.tqdm(
                            pool.imap(
                                self._batch_sql						,			[(offset, index, to_sql_kwargs) for offset in range(0						,			__lowerCAmelCase						,			__lowerCAmelCase		)]						,			)						,			total=(num_rows // batch_size) + 1 if num_rows % batch_size else num_rows // batch_size						,			unit="""ba"""						,			disable=not logging.is_progress_bar_enabled()						,			desc="""Creating SQL from Arrow format"""						,			):
                              written += num_rows

            return written



