






import bza
import gzip
import lzma
import os
import shutil
import struct
import tarfile
import warnings
import zipfile
from abc import ABC, abstractmethod
from pathlib import Path
from typing import Dict, List, Optional, Type, Union

from .. import config
from .filelock import FileLock
from .logging import get_logger


a		:       Dict			     = get_logger(__name__)
class     a    :



      """simple docstring"""


      def __init__(      self					:			Optional[Any]		,      __lowercase					:			int = None					)							->      Tuple:
        __UpperCAmelCase							:	Tuple           =  (
            os.path.join(__lowerCamelCase		,      config.EXTRACTED_DATASETS_DIR					) if cache_dir else config.EXTRACTED_DATASETS_PATH
        )
        __UpperCAmelCase							:	Optional[int]           =  Extractor
      def 	UpperCAmelCase      (      self					:			Dict		,      __lowercase					:			Optional[int]					)							->      int:
        from .file_utils import hash_url_to_filename

        # Path where we extract compressed archives
        # We extract in the cache dir, and get the extracted path name by hashing the original path"
        __UpperCAmelCase							:	Optional[int]           =  os.path.abspath(__lowerCamelCase					)
        return os.path.join(self.extract_dir		,      hash_url_to_filename(__lowerCamelCase					)					)
      def 	UpperCAmelCase      (      self					:			List[Any]		,      __lowercase					:			Dict		,      __lowercase					:			List[Any]					)							->      Union[str, Any]:
        return force_extract or (
            not os.path.isfile(__lowerCamelCase					) and not (os.path.isdir(__lowerCamelCase					) and os.listdir(__lowerCamelCase					))
        )




      def 	UpperCAmelCase      (      self					:			Tuple		,      __lowercase					:			List[Any]		,      __lowercase					:			Optional[int] = False					)							->      Union[str, Any]:
        __UpperCAmelCase							:	Tuple           =  self.extractor.infer_extractor_format(__lowerCamelCase					)
        if not extractor_format:
          return input_path
        __UpperCAmelCase							:	Any           =  self._get_output_path(__lowerCamelCase					)
        if self._do_extract(__lowerCamelCase		,      __lowerCamelCase					):
          self.extractor.extract(__lowerCamelCase		,      __lowerCamelCase		,      __lowerCamelCase					)
        return output_path


class     a    ( SCREAMING_SNAKE_CASE__   ):



      """simple docstring"""


      @classmethod
      @abstractmethod
      def 	UpperCAmelCase      (      cls					:			Optional[Any]		,      __lowercase					:			Optional[Any]		,      **__lowercase					:			List[Any]					)							->      int:
        ...




      @staticmethod
      @abstractmethod
      def 	UpperCAmelCase      (      __lowercase					:			Optional[int]		,      __lowercase					:			List[Any]					)							->      Union[str, Any]:
        ...


class     a    ( SCREAMING_SNAKE_CASE__							,       SCREAMING_SNAKE_CASE__   ):



      """simple docstring"""


      a  : int							       =	[]
      @staticmethod
      def 	UpperCAmelCase      (      __lowercase					:			List[Any]		,      __lowercase					:			Union[str, Any]					)							->      Tuple:




        with open(__lowerCamelCase		,      """rb"""					) as f:
          return f.read(__lowerCamelCase					)




      @classmethod
      def 	UpperCAmelCase      (      cls					:			Any		,      __lowercase					:			str		,      __lowercase					:			Union[str, Any] = b""					)							->      Tuple:




        if not magic_number:
          __UpperCAmelCase							:	List[Any]           =  max(len(__lowerCamelCase					) for cls_magic_number in cls.magic_numbers					)
          try:
            __UpperCAmelCase							:	List[str]           =  cls.read_magic_number(__lowerCamelCase		,      __lowerCamelCase					)
          except OSError:
            return False
        return any(magic_number.startswith(__lowerCamelCase					) for cls_magic_number in cls.magic_numbers					)


class     a    ( SCREAMING_SNAKE_CASE__   ):



      """simple docstring"""


      @classmethod
      def 	UpperCAmelCase      (      cls					:			int		,      __lowercase					:			List[Any]		,      **__lowercase					:			Optional[int]					)							->      Optional[int]:
        return tarfile.is_tarfile(__lowerCamelCase					)
      @staticmethod
      def 	UpperCAmelCase      (      __lowercase					:			Optional[int]		,      __lowercase					:			Dict					)							->      str:




        def resolved(__lowercase					:			Any					) -> str:
          return os.path.realpath(os.path.abspath(__lowerCamelCase					)					)

        def badpath(__lowercase					:			Any		,      __lowercase					:			int					) -> bool:
          # joinpath will ignore base if path is absolute
          return not resolved(os.path.join(__lowerCamelCase		,      __lowerCamelCase					)					).startswith(__lowerCamelCase					)

        def badlink(__lowercase					:			List[str]		,      __lowercase					:			Optional[Any]					) -> bool:
          # Links are interpreted relative to the directory containing the link
          __UpperCAmelCase							:	Union[str, Any]           =  resolved(os.path.join(__lowerCamelCase		,      os.path.dirname(info.name					)					)					)
          return badpath(info.linkname		,      base=__lowerCamelCase					)

        __UpperCAmelCase							:	str           =  resolved(__lowerCamelCase					)

        for finfo in members:
          if badpath(finfo.name		,      __lowerCamelCase					):
            logger.error(f"""Extraction of {finfo.name} is blocked (illegal path)"""					)
          elif finfo.issym() and badlink(__lowerCamelCase		,      __lowerCamelCase					):
            logger.error(f"""Extraction of {finfo.name} is blocked: Symlink to {finfo.linkname}"""					)
          elif finfo.islnk() and badlink(__lowerCamelCase		,      __lowerCamelCase					):
            logger.error(f"""Extraction of {finfo.name} is blocked: Hard link to {finfo.linkname}"""					)
          else:
            yield finfo




      @staticmethod
      def 	UpperCAmelCase      (      __lowercase					:			str		,      __lowercase					:			Tuple					)							->      Tuple:
        os.makedirs(__lowerCamelCase		,      exist_ok=__lowerCamelCase					)
        __UpperCAmelCase							:	List[Any]           =  tarfile.open(__lowerCamelCase					)
        tar_file.extractall(__lowerCamelCase		,      members=TarExtractor.safemembers(__lowerCamelCase		,      __lowerCamelCase					)					)
        tar_file.close()


class     a    ( SCREAMING_SNAKE_CASE__   ):



      """simple docstring"""


      a  : Optional[int]							       =	[B'\x1F\x8B']
      @staticmethod
      def 	UpperCAmelCase      (      __lowercase					:			Tuple		,      __lowercase					:			int					)							->      Optional[Any]:




        with gzip.open(__lowerCamelCase		,      """rb"""					) as gzip_file:
          with open(__lowerCamelCase		,      """wb"""					) as extracted_file:
            shutil.copyfileobj(__lowerCamelCase		,      __lowerCamelCase					)


class     a    ( SCREAMING_SNAKE_CASE__   ):



      """simple docstring"""


      a  : str							       =	[
          B'PK\x03\x04',
          B'PK\x05\x06',  # empty archive
          B'PK\x07\x08',  # spanned archive
      ]
      @classmethod
      def 	UpperCAmelCase      (      cls					:			Dict		,      __lowercase					:			Union[str, Any]		,      __lowercase					:			Any = b""					)							->      Union[str, Any]:




        if super().is_extractable(__lowerCamelCase		,      magic_number=__lowerCamelCase					):
          return True
        try:
          # Alternative version of zipfile.is_zipfile that has less false positives, but misses executable zip archives.
          # From: https://github.com/python/cpython/pull/5053
          from zipfile import (
              _CD_SIGNATURE,
              _ECD_DISK_NUMBER,
              _ECD_DISK_START,
              _ECD_ENTRIES_TOTAL,
              _ECD_OFFSET,
              _ECD_SIZE,
              _EndRecData,
              sizeCentralDir,
              stringCentralDir,
              structCentralDir,
          )

          with open(__lowerCamelCase		,      """rb"""					) as fp:
            __UpperCAmelCase							:	Dict           =  _EndRecData(__lowerCamelCase					)
            if endrec:
              if endrec[_ECD_ENTRIES_TOTAL] == 0 and endrec[_ECD_SIZE] == 0 and endrec[_ECD_OFFSET] == 0:
                return True  # Empty zipfiles are still zipfiles
              elif endrec[_ECD_DISK_NUMBER] == endrec[_ECD_DISK_START]:
                fp.seek(endrec[_ECD_OFFSET]					)  # Central directory is on the same disk
                if fp.tell() == endrec[_ECD_OFFSET] and endrec[_ECD_SIZE] >= sizeCentralDir:
                  __UpperCAmelCase							:	int           =  fp.read(__lowerCamelCase					)  # CD is where we expect it to be
                  if len(__lowerCamelCase					) == sizeCentralDir:
                    __UpperCAmelCase							:	List[str]           =  struct.unpack(__lowerCamelCase		,      __lowerCamelCase					)  # CD is the right size
                    if centdir[_CD_SIGNATURE] == stringCentralDir:
                      return True  # First central directory entry  has correct magic number
          return False
        except Exception:  # catch all errors in case future python versions change the zipfile internals
          return False




      @staticmethod
      def 	UpperCAmelCase      (      __lowercase					:			Optional[Any]		,      __lowercase					:			List[Any]					)							->      str:
        os.makedirs(__lowerCamelCase		,      exist_ok=__lowerCamelCase					)
        with zipfile.ZipFile(__lowerCamelCase		,      """r"""					) as zip_file:
          zip_file.extractall(__lowerCamelCase					)
          zip_file.close()


class     a    ( SCREAMING_SNAKE_CASE__   ):



      """simple docstring"""


      a  : Tuple							       =	[B'\xFD\x37\x7A\x58\x5A\x00']
      @staticmethod
      def 	UpperCAmelCase      (      __lowercase					:			Optional[int]		,      __lowercase					:			Tuple					)							->      int:




        with lzma.open(__lowerCamelCase					) as compressed_file:
          with open(__lowerCamelCase		,      """wb"""					) as extracted_file:
            shutil.copyfileobj(__lowerCamelCase		,      __lowerCamelCase					)


class     a    ( SCREAMING_SNAKE_CASE__   ):



      """simple docstring"""


      a  : int							       =	[B'Rar!\x1a\x07\x00', B'Rar!\x1a\x07\x01\x00']  # RAR_ID  # RAR5_ID
      @staticmethod
      def 	UpperCAmelCase      (      __lowercase					:			Union[str, Any]		,      __lowercase					:			Tuple					)							->      Dict:




        if not config.RARFILE_AVAILABLE:
          raise ImportError("""Please pip install rarfile"""					)
        import rarfile

        os.makedirs(__lowerCamelCase		,      exist_ok=__lowerCamelCase					)
        __UpperCAmelCase							:	List[str]           =  rarfile.RarFile(__lowerCamelCase					)
        rf.extractall(__lowerCamelCase					)
        rf.close()


class     a    ( SCREAMING_SNAKE_CASE__   ):



      """simple docstring"""


      a  : Any							       =	[B'\x28\xb5\x2F\xFD']
      @staticmethod
      def 	UpperCAmelCase      (      __lowercase					:			Tuple		,      __lowercase					:			List[str]					)							->      Tuple:




        if not config.ZSTANDARD_AVAILABLE:
          raise ImportError("""Please pip install zstandard"""					)
        import zstandard as zstd

        __UpperCAmelCase							:	List[Any]           =  zstd.ZstdDecompressor()
        with open(__lowerCamelCase		,      """rb"""					) as ifh, open(__lowerCamelCase		,      """wb"""					) as ofh:
          dctx.copy_stream(__lowerCamelCase		,      __lowerCamelCase					)


class     a    ( SCREAMING_SNAKE_CASE__   ):



      """simple docstring"""


      a  : List[str]							       =	[B'\x42\x5A\x68']
      @staticmethod
      def 	UpperCAmelCase      (      __lowercase					:			Any		,      __lowercase					:			Union[str, Any]					)							->      Optional[int]:




        with bza.open(__lowerCamelCase		,      """rb"""					) as compressed_file:
          with open(__lowerCamelCase		,      """wb"""					) as extracted_file:
            shutil.copyfileobj(__lowerCamelCase		,      __lowerCamelCase					)


class     a    ( SCREAMING_SNAKE_CASE__   ):



      """simple docstring"""


      a  : Any							       =	[B'\x37\x7A\xBC\xAF\x27\x1C']
      @staticmethod
      def 	UpperCAmelCase      (      __lowercase					:			int		,      __lowercase					:			int					)							->      List[str]:




        if not config.PY7ZR_AVAILABLE:
          raise ImportError("""Please pip install py7zr"""					)
        import pyazr

        os.makedirs(__lowerCamelCase		,      exist_ok=__lowerCamelCase					)
        with pyazr.SevenZipFile(__lowerCamelCase		,      """r"""					) as archive:
          archive.extractall(__lowerCamelCase					)


class     a    ( SCREAMING_SNAKE_CASE__   ):



      """simple docstring"""


      a  : str							       =	[B'\x04\x22\x4D\x18']
      @staticmethod
      def 	UpperCAmelCase      (      __lowercase					:			Tuple		,      __lowercase					:			Any					)							->      Any:




        if not config.LZ4_AVAILABLE:
          raise ImportError("""Please pip install lz4"""					)
        import lza.frame

        with lza.frame.open(__lowerCamelCase		,      """rb"""					) as compressed_file:
          with open(__lowerCamelCase		,      """wb"""					) as extracted_file:
            shutil.copyfileobj(__lowerCamelCase		,      __lowerCamelCase					)


class     a    :



      """simple docstring"""


      a  : Tuple							       =	{
          'tar': TarExtractor,
          'gzip': GzipExtractor,
          'zip': ZipExtractor,
          'xz': XzExtractor,
          'rar': RarExtractor,
          'zstd': ZstdExtractor,
          'bz2': BzipaExtractor,
          '7z': SevenZipExtractor,  # <Added version="2.4.0"/>
          'lz4': LzaExtractor,  # <Added version="2.4.0"/>
      }
      @classmethod
      def 	UpperCAmelCase      (      cls					:			List[str]					)							->      Tuple:
        return max(
            len(__lowerCamelCase					)
            for extractor in cls.extractors.values()
            if issubclass(__lowerCamelCase		,      __lowerCamelCase					)
            for extractor_magic_number in extractor.magic_numbers					)
      @staticmethod
      def 	UpperCAmelCase      (      __lowercase					:			List[str]		,      __lowercase					:			str					)							->      Any:




        try:
          return MagicNumberBaseExtractor.read_magic_number(__lowerCamelCase		,      magic_number_length=__lowerCamelCase					)
        except OSError:
          return b""
      @classmethod
      def 	UpperCAmelCase      (      cls					:			Optional[int]		,      __lowercase					:			Tuple		,      __lowercase					:			Optional[int] = False					)							->      Optional[Any]:
        warnings.warn(
            """Method \'is_extractable\' was deprecated in version 2.4.0 and will be removed in 3.0.0. """
            """Use \'infer_extractor_format\' instead."""		,      category=__lowerCamelCase		,      )
        __UpperCAmelCase							:	int           =  cls.infer_extractor_format(__lowerCamelCase					)
        if extractor_format:
          return True if not return_extractor else (True, cls.extractors[extractor_format])
        return False if not return_extractor else (False, None)
      @classmethod
      def 	UpperCAmelCase      (      cls					:			Union[str, Any]		,      __lowercase					:			Optional[Any]					)							->      Union[str, Any]:  # <Added version="2.4.0"/>
        __UpperCAmelCase							:	List[Any]           =  cls._get_magic_number_max_length()
        __UpperCAmelCase							:	int           =  cls._read_magic_number(__lowerCamelCase		,      __lowerCamelCase					)
        for extractor_format, extractor in cls.extractors.items():
          if extractor.is_extractable(__lowerCamelCase		,      magic_number=__lowerCamelCase					):
            return extractor_format




      @classmethod
      def 	UpperCAmelCase      (      cls					:			Optional[Any]		,      __lowercase					:			List[str]		,      __lowercase					:			List[str]		,      __lowercase					:			Tuple = None		,      __lowercase					:			Any = "deprecated"		,      )							->      Union[str, Any]:
        os.makedirs(os.path.dirname(__lowerCamelCase					)		,      exist_ok=__lowerCamelCase					)
        # Prevent parallel extractions
        __UpperCAmelCase							:	str           =  str(Path(__lowerCamelCase					).with_suffix(""".lock"""					)					)
        with FileLock(__lowerCamelCase					):
          shutil.rmtree(__lowerCamelCase		,      ignore_errors=__lowerCamelCase					)
          if extractor_format or extractor != "deprecated":
            if extractor != "deprecated" or not isinstance(__lowerCamelCase		,      __lowerCamelCase					):  # passed as positional arg
              warnings.warn(
                  """Parameter \'extractor\' was deprecated in version 2.4.0 and will be removed in 3.0.0. """
                  """Use \'extractor_format\' instead."""		,      category=__lowerCamelCase		,      )
              __UpperCAmelCase							:	str           =  extractor if extractor != '''deprecated''' else extractor_format
            else:
              __UpperCAmelCase							:	str           =  cls.extractors[extractor_format]
            return extractor.extract(__lowerCamelCase		,      __lowerCamelCase					)
          else:
            warnings.warn(
                """Parameter \'extractor_format\' was made required in version 2.4.0 and not passing it will raise an """
                """exception in 3.0.0."""		,      category=__lowerCamelCase		,      )
            for extractor in cls.extractors.values():
              if extractor.is_extractable(__lowerCamelCase					):
                return extractor.extract(__lowerCamelCase		,      __lowerCamelCase					)









"""simple docstring"""



def 		__lowercase     (   snake_case_  :  dict						)   ->set:



    '''simple docstring'''







    __A    :						List[str]						 =     set()
    # edges = list of graph's edges
    __A    :						Optional[int]						 =     get_edges(snake_case_						)

    # While there are still elements in edges list, take an arbitrary edge
    # (from_node, to_node) and add his extremity to chosen_vertices and then
    # remove all arcs adjacent to the from_node and to_node
    while edges:
        __A ,       __A    :						str						 =     edges.pop()
        chosen_vertices.add(snake_case_						)
        chosen_vertices.add(snake_case_						)
        for edge in edges.copy():
            if from_node in edge or to_node in edge:
                edges.discard(snake_case_						)
    return chosen_vertices







def 		__lowercase     (   snake_case_  :  dict						)   ->set:



    '''simple docstring'''







    __A    :						Tuple						 =     set()
    for from_node, to_nodes in graph.items():
        for to_node in to_nodes:
            edges.add((from_node, to_node)						)
    return edges


if __name__ == "__main__":
       import doctest

       doctest.testmod()

       # graph = {0: [1, 3], 1: [0, 3], 2: [0, 3, 4], 3: [0, 1, 2], 4: [2, 3]}
       # print(f"Matching vertex cover:\n{matching_min_vertex_cover(graph)}")




