text: """zipimport provides support for importing Python modules from Zip archives.
  
  This module exports three objects:
  - zipimporter: a class; its constructor takes a path to a Zip archive.
  - ZipImportError: exception raised by zipimporter objects. It's a
    subclass of ImportError, so it can be caught as ImportError, too.
  - _zip_directory_cache: a dict, mapping archive paths to zip directory
    info dicts, as used in zipimporter._files.
  
  It is usually not needed to use the zipimport module explicitly; it is
  used by the builtin import mechanism for sys.path items that are paths
  to Zip archives.
  """
  
  #from importlib import _bootstrap_external
  #from importlib import _bootstrap  # for _verbose_message
  import _frozen_importlib_external as _bootstrap_external
  from _frozen_importlib_external import _unpack_uint16, _unpack_uint32
  import _frozen_importlib as _bootstrap  # for _verbose_message
  import _imp  # for check_hash_based_pycs
  import _io  # for open
  import marshal  # for loads
  import sys  # for modules
  import time  # for mktime
  
  __all__ = ['ZipImportError', 'zipimporter']
  
  
  path_sep = _bootstrap_external.path_sep
  alt_path_sep = _bootstrap_external.path_separators[1:]
  
  
  class ZipImportError(ImportError):
      pass
  
  # _read_directory() cache
  _zip_directory_cache = {}
  
  _module_type = type(sys)
  
  
  class zipimporter:
      """zipimporter(archivepath) -> zipimporter object
  
      Create a new zipimporter instance. 'archivepath' must be a path to
      a zipfile, or to a specific path inside a zipfile. For example, it can be
      '/tmp/myimport.zip', or '/tmp/myimport.zip/mydirectory', if mydirectory is a
      valid directory inside the archive.
  
      'ZipImportError is raised if 'archivepath' doesn't point to a valid Zip
      archive.
  
      The 'archive' attribute of zipimporter objects contains the name of the
      zipfile targeted.
      """
  
      # Split the "subdirectory" from the Zip archive path, lookup a matching
      # entry in sys.path_importer_cache, fetch the file directory from there
      # if found, or else read it from the archive.
      def __init__(self, path):
          if not isinstance(path, str):
              import os
              path = os.fsdecode(path)
          if not path:
              raise ZipImportError('archive path is empty', path=path)
          if alt_path_sep:
              path = path.replace(alt_path_sep, path_sep)
  
          prefix = []
          while True:
              try:
                  st = _bootstrap_external._path_stat(path)
              except (OSError, ValueError):
                  # On Windows a ValueError is raised for too long paths.
                  # Back up one path element.
                  dirname, basename = _bootstrap_external._path_split(path)
                  if dirname == path:
                      raise ZipImportError('not a Zip file', path=path)
                  path = dirname
                  prefix.append(basename)
              else:
                  # it exists
                  if (st.st_mode & 0o170000) != 0o100000:  # stat.S_ISREG
                      # it's a not file
                      raise ZipImportError('not a Zip file', path=path)
                  break
  
          try:
              files = _zip_directory_cache[path]
          except KeyError:
              files = _read_directory(path)
              _zip_directory_cache[path] = files
          self._files = files
          self.archive = path
          # a prefix directory following the ZIP file path.
          self.prefix = _bootstrap_external._path_join(*prefix[::-1])
          if self.prefix:
              self.prefix += path_sep
  
  
      # Check whether we can satisfy the import of the module named by
      # 'fullname', or whether it could be a portion of a namespace
      # package. Return self if we can load it, a string containing the
      # full path if it's a possible namespace portion, None if we
      # can't load it.
      def find_loader(self, fullname, path=None):
          """find_loader(fullname, path=None) -> self, str or None.
  
          Search for a module specified by 'fullname'. 'fullname' must be the
          fully qualified (dotted) module name. It returns the zipimporter
          instance itself if the module was found, a string containing the
          full path name if it's possibly a portion of a namespace package,
          or None otherwise. The optional 'path' argument is ignored -- it's
          there for compatibility with the importer protocol.
          """
          mi = _get_module_info(self, fullname)
          if mi is not None:
              # This is a module or package.
              return self, []
  
          # Not a module or regular package. See if this is a directory, and
          # therefore possibly a portion of a namespace package.
  
          # We're only interested in the last path component of fullname
          # earlier components are recorded in self.prefix.
          modpath = _get_module_path(self, fullname)
          if _is_dir(self, modpath):
              # This is possibly a portion of a namespace
              # package. Return the string representing its path,
              # without a trailing separator.
              return None, [f'{self.archive}{path_sep}{modpath}']
  
          return None, []
  
  
      # Check whether we can satisfy the import of the module named by
      # 'fullname'. Return self if we can, None if we can't.
      def find_module(self, fullname, path=None):
          """find_module(fullname, path=None) -> self or None.
  
          Search for a module specified by 'fullname'. 'fullname' must be the
          fully qualified (dotted) module name. It returns the zipimporter
          instance itself if the module was found, or None if it wasn't.
          The optional 'path' argument is ignored -- it's there for compatibility
          with the importer protocol.
          """
          return self.find_loader(fullname, path)[0]
  
  
      def get_code(self, fullname):
          """get_code(fullname) -> code object.
  
          Return the code object for the specified module. Raise ZipImportError
          if the module couldn't be found.
          """
          code, ispackage, modpath = _get_module_code(self, fullname)
          return code
  
  
      def get_data(self, pathname):
          """get_data(pathname) -> string with file data.
  
          Return the data associated with 'pathname'. Raise OSError if
          the file wasn't found.
          """
          if alt_path_sep:
              pathname = pathname.replace(alt_path_sep, path_sep)
  
          key = pathname
          if pathname.startswith(self.archive + path_sep):
              key = pathname[len(self.archive + path_sep):]
  
          try:
              toc_entry = self._files[key]
          except KeyError:
              raise OSError(0, '', key)
          return _get_data(self.archive, toc_entry)
  
  
      # Return a string matching __file__ for the named module
      def get_filename(self, fullname):
          """get_filename(fullname) -> filename string.
  
          Return the filename for the specified module.
          """
          # Deciding the filename requires working out where the code
          # would come from if the module was actually loaded
          code, ispackage, modpath = _get_module_code(self, fullname)
          return modpath
  
  
      def get_source(self, fullname):
          """get_source(fullname) -> source string.
  
          Return the source code for the specified module. Raise ZipImportError
          if the module couldn't be found, return None if the archive does
          contain the module, but has no source for it.
          """
          mi = _get_module_info(self, fullname)
          if mi is None:
              raise ZipImportError(f"can't find module {fullname!r}", name=fullname)
  
          path = _get_module_path(self, fullname)
          if mi:
              fullpath = _bootstrap_external._path_join(path, '__init__.py')
          else:
              fullpath = f'{path}.py'
  
          try:
              toc_entry = self._files[fullpath]
          except KeyError:
              # we have the module, but no source
              return None
          return _get_data(self.archive, toc_entry).decode()
  
  
      # Return a bool signifying whether the module is a package or not.
      def is_package(self, fullname):
          """is_package(fullname) -> bool.
  
          Return True if the module specified by fullname is a package.
          Raise ZipImportError if the module couldn't be found.
          """
          mi = _get_module_info(self, fullname)
          if mi is None:
              raise ZipImportError(f"can't find module {fullname!r}", name=fullname)
          return mi
  
  
      # Load and return the module named by 'fullname'.
      def load_module(self, fullname):
          """load_module(fullname) -> module.
  
          Load the module specified by 'fullname'. 'fullname' must be the
          fully qualified (dotted) module name. It returns the imported
          module, or raises ZipImportError if it wasn't found.
          """
          code, ispackage, modpath = _get_module_code(self, fullname)
          mod = sys.modules.get(fullname)
          if mod is None or not isinstance(mod, _module_type):
              mod = _module_type(fullname)
              sys.modules[fullname] = mod
          mod.__loader__ = self
  
          try:
              if ispackage:
                  # add __path__ to the module *before* the code gets
                  # executed
                  path = _get_module_path(self, fullname)
                  fullpath = _bootstrap_external._path_join(self.archive, path)
                  mod.__path__ = [fullpath]
  
              if not hasattr(mod, '__builtins__'):
                  mod.__builtins__ = __builtins__
              _bootstrap_external._fix_up_module(mod.__dict__, fullname, modpath)
              exec(code, mod.__dict__)
          except:
              del sys.modules[fullname]
              raise
  
          try:
              mod = sys.modules[fullname]
          except KeyError:
              raise ImportError(f'Loaded module {fullname!r} not found in sys.modules')
          _bootstrap._verbose_message('import {} # loaded from Zip {}', fullname, modpath)
          return mod
  
  
      def get_resource_reader(self, fullname):
          """Return the ResourceReader for a package in a zip file.
  
          If 'fullname' is a package within the zip file, return the
          'ResourceReader' object for the package.  Otherwise return None.
          """
          try:
              if not self.is_package(fullname):
                  return None
          except ZipImportError:
              return None
          if not _ZipImportResourceReader._registered:
              from importlib.abc import ResourceReader
              ResourceReader.register(_ZipImportResourceReader)
              _ZipImportResourceReader._registered = True
          return _ZipImportResourceReader(self, fullname)
  
  
      def __repr__(self):
          return f'<zipimporter object "{self.archive}{path_sep}{self.prefix}">'
  
  
  # _zip_searchorder defines how we search for a module in the Zip
  # archive: we first search for a package __init__, then for
  # non-package .pyc, and .py entries. The .pyc entries
  # are swapped by initzipimport() if we run in optimized mode. Also,
  # '/' is replaced by path_sep there.
  _zip_searchorder = (
      (path_sep + '__init__.pyc', True, True),
      (path_sep + '__init__.py', False, True),
      ('.pyc', True, False),
      ('.py', False, False),
  )
  
  # Given a module name, return the potential file path in the
  # archive (without extension).
  def _get_module_path(self, fullname):
      return self.prefix + fullname.rpartition('.')[2]
  
  # Does this path represent a directory?
  def _is_dir(self, path):
      # See if this is a "directory". If so, it's eligible to be part
      # of a namespace package. We test by seeing if the name, with an
      # appended path separator, exists.
      dirpath = path + path_sep
      # If dirpath is present in self._files, we have a directory.
      return dirpath in self._files
  
  # Return some information about a module.
  def _get_module_info(self, fullname):
      path = _get_module_path(self, fullname)
      for suffix, isbytecode, ispackage in _zip_searchorder:
          fullpath = path + suffix
          if fullpath in self._files:
              return ispackage
      return None
  
  
  # implementation
  
  # _read_directory(archive) -> files dict (new reference)
  #
  # Given a path to a Zip archive, build a dict, mapping file names
  # (local to the archive, using SEP as a separator) to toc entries.
  #
  # A toc_entry is a tuple:
  #
  # (__file__,        # value to use for __file__, available for all files,
  #                   # encoded to the filesystem encoding
  #  compress,        # compression kind; 0 for uncompressed
  #  data_size,       # size of compressed data on disk
  #  file_size,       # size of decompressed data
  #  file_offset,     # offset of file header from start of archive
  #  time,            # mod time of file (in dos format)
  #  date,            # mod data of file (in dos format)
  #  crc,             # crc checksum of the data
  # )
  #
  # Directories can be recognized by the trailing path_sep in the name,
  # data_size and file_offset are 0.
  def _read_directory(archive):
      try:
          fp = _io.open(archive, 'rb')
      except OSError:
          raise ZipImportError(f"can't open Zip file: {archive!r}", path=archive)
  
      with fp:
          try:
              fp.seek(-22, 2)
              header_position = fp.tell()
              buffer = fp.read(22)
          except OSError:
              raise ZipImportError(f"can't read Zip file: {archive!r}", path=archive)
          if len(buffer) != 22:
              raise ZipImportError(f"can't read Zip file: {archive!r}", path=archive)
          if buffer[:4] != b'PK\x05\x06':
              # Bad: End of Central Dir signature
              raise ZipImportError(f'not a Zip file: {archive!r}', path=archive)
  
          header_size = _unpack_uint32(buffer[12:16])
          header_offset = _unpack_uint32(buffer[16:20])
          if header_position < header_size:
              raise ZipImportError(f'bad central directory size: {archive!r}', path=archive)
          if header_position < header_offset:
              raise ZipImportError(f'bad central directory offset: {archive!r}', path=archive)
          header_position -= header_size
          arc_offset = header_position - header_offset
          if arc_offset < 0:
              raise ZipImportError(f'bad central directory size or offset: {archive!r}', path=archive)
  
          files = {}
          # Start of Central Directory
          count = 0
          try:
              fp.seek(header_position)
          except OSError:
              raise ZipImportError(f"can't read Zip file: {archive!r}", path=archive)
          while True:
              buffer = fp.read(46)
              if len(buffer) < 4:
                  raise EOFError('EOF read where not expected')
              # Start of file header
              if buffer[:4] != b'PK\x01\x02':
                  break                                # Bad: Central Dir File Header
              if len(buffer) != 46:
                  raise EOFError('EOF read where not expected')
              flags = _unpack_uint16(buffer[8:10])
              compress = _unpack_uint16(buffer[10:12])
              time = _unpack_uint16(buffer[12:14])
              date = _unpack_uint16(buffer[14:16])
              crc = _unpack_uint32(buffer[16:20])
              data_size = _unpack_uint32(buffer[20:24])
              file_size = _unpack_uint32(buffer[24:28])
              name_size = _unpack_uint16(buffer[28:30])
              extra_size = _unpack_uint16(buffer[30:32])
              comment_size = _unpack_uint16(buffer[32:34])
              file_offset = _unpack_uint32(buffer[42:46])
              header_size = name_size + extra_size + comment_size
              if file_offset > header_offset:
                  raise ZipImportError(f'bad local header offset: {archive!r}', path=archive)
              file_offset += arc_offset
  
              try:
                  name = fp.read(name_size)
              except OSError:
                  raise ZipImportError(f"can't read Zip file: {archive!r}", path=archive)
              if len(name) != name_size:
                  raise ZipImportError(f"can't read Zip file: {archive!r}", path=archive)
              # On Windows, calling fseek to skip over the fields we don't use is
              # slower than reading the data because fseek flushes stdio's
              # internal buffers.    See issue #8745.
              try:
                  if len(fp.read(header_size - name_size)) != header_size - name_size:
                      raise ZipImportError(f"can't read Zip file: {archive!r}", path=archive)
              except OSError:
                  raise ZipImportError(f"can't read Zip file: {archive!r}", path=archive)
  
              if flags & 0x800:
                  # UTF-8 file names extension
                  name = name.decode()
              else:
                  # Historical ZIP filename encoding
                  try:
                      name = name.decode('ascii')
                  except UnicodeDecodeError:
                      name = name.decode('latin1').translate(cp437_table)
  
              name = name.replace('/', path_sep)
              path = _bootstrap_external._path_join(archive, name)
              t = (path, compress, data_size, file_size, file_offset, time, date, crc)
              files[name] = t
              count += 1
      _bootstrap._verbose_message('zipimport: found {} names in {!r}', count, archive)
      return files
  
  # During bootstrap, we may need to load the encodings
  # package from a ZIP file. But the cp437 encoding is implemented
  # in Python in the encodings package.
  #
  # Break out of this dependency by using the translation table for
  # the cp437 encoding.
  cp437_table = (
      # ASCII part, 8 rows x 16 chars
      '\x00\x01\x02\x03\x04\x05\x06\x07\x08\t\n\x0b\x0c\r\x0e\x0f'
      '\x10\x11\x12\x13\x14\x15\x16\x17\x18\x19\x1a\x1b\x1c\x1d\x1e\x1f'
      ' !"#$%&\'()*+,-./'
      '0123456789:;<=>?'
      '@ABCDEFGHIJKLMNO'
      'PQRSTUVWXYZ[\\]^_'
      '`abcdefghijklmno'
      'pqrstuvwxyz{|}~\x7f'
      # non-ASCII part, 16 rows x 8 chars
      '\xc7\xfc\xe9\xe2\xe4\xe0\xe5\xe7'
      '\xea\xeb\xe8\xef\xee\xec\xc4\xc5'
      '\xc9\xe6\xc6\xf4\xf6\xf2\xfb\xf9'
      '\xff\xd6\xdc\xa2\xa3\xa5\u20a7\u0192'
      '\xe1\xed\xf3\xfa\xf1\xd1\xaa\xba'
      '\xbf\u2310\xac\xbd\xbc\xa1\xab\xbb'
      '\u2591\u2592\u2593\u2502\u2524\u2561\u2562\u2556'
      '\u2555\u2563\u2551\u2557\u255d\u255c\u255b\u2510'
      '\u2514\u2534\u252c\u251c\u2500\u253c\u255e\u255f'
      '\u255a\u2554\u2569\u2566\u2560\u2550\u256c\u2567'
      '\u2568\u2564\u2565\u2559\u2558\u2552\u2553\u256b'
      '\u256a\u2518\u250c\u2588\u2584\u258c\u2590\u2580'
      '\u03b1\xdf\u0393\u03c0\u03a3\u03c3\xb5\u03c4'
      '\u03a6\u0398\u03a9\u03b4\u221e\u03c6\u03b5\u2229'
      '\u2261\xb1\u2265\u2264\u2320\u2321\xf7\u2248'
      '\xb0\u2219\xb7\u221a\u207f\xb2\u25a0\xa0'
  )
  
  _importing_zlib = False
  
  # Return the zlib.decompress function object, or NULL if zlib couldn't
  # be imported. The function is cached when found, so subsequent calls
  # don't import zlib again.
  def _get_decompress_func():
      global _importing_zlib
      if _importing_zlib:
          # Someone has a zlib.py[co] in their Zip file
          # let's avoid a stack overflow.
          _bootstrap._verbose_message('zipimport: zlib UNAVAILABLE')
          raise ZipImportError("can't decompress data; zlib not available")
  
      _importing_zlib = True
      try:
          from zlib import decompress
      except Exception:
          _bootstrap._verbose_message('zipimport: zlib UNAVAILABLE')
          raise ZipImportError("can't decompress data; zlib not available")
      finally:
          _importing_zlib = False
  
      _bootstrap._verbose_message('zipimport: zlib available')
      return decompress
  
  # Given a path to a Zip file and a toc_entry, return the (uncompressed) data.
  def _get_data(archive, toc_entry):
      datapath, compress, data_size, file_size, file_offset, time, date, crc = toc_entry
      if data_size < 0:
          raise ZipImportError('negative data size')
  
      with _io.open(archive, 'rb') as fp:
          # Check to make sure the local file header is correct
          try:
              fp.seek(file_offset)
          except OSError:
              raise ZipImportError(f"can't read Zip file: {archive!r}", path=archive)
          buffer = fp.read(30)
          if len(buffer) != 30:
              raise EOFError('EOF read where not expected')
  
          if buffer[:4] != b'PK\x03\x04':
              # Bad: Local File Header
              raise ZipImportError(f'bad local file header: {archive!r}', path=archive)
  
          name_size = _unpack_uint16(buffer[26:28])
          extra_size = _unpack_uint16(buffer[28:30])
          header_size = 30 + name_size + extra_size
          file_offset += header_size  # Start of file data
          try:
              fp.seek(file_offset)
          except OSError:
              raise ZipImportError(f"can't read Zip file: {archive!r}", path=archive)
          raw_data = fp.read(data_size)
          if len(raw_data) != data_size:
              raise OSError("zipimport: can't read data")
  
      if compress == 0:
          # data is not compressed
          return raw_data
  
      # Decompress with zlib
      try:
          decompress = _get_decompress_func()
      except Exception:
          raise ZipImportError("can't decompress data; zlib not available")
      return decompress(raw_data, -15)
  
  
  # Lenient date/time comparison function. The precision of the mtime
  # in the archive is lower than the mtime stored in a .pyc: we
  # must allow a difference of at most one second.
  def _eq_mtime(t1, t2):
      # dostime only stores even seconds, so be lenient
      return abs(t1 - t2) <= 1
  
  # Given the contents of a .py[co] file, unmarshal the data
  # and return the code object. Return None if it the magic word doesn't
  # match (we do this instead of raising an exception as we fall back
  # to .py if available and we don't want to mask other errors).
  def _unmarshal_code(pathname, data, mtime):
      if len(data) < 16:
          raise ZipImportError('bad pyc data')
  
      if data[:4] != _bootstrap_external.MAGIC_NUMBER:
          _bootstrap._verbose_message('{!r} has bad magic', pathname)
          return None  # signal caller to try alternative
  
      flags = _unpack_uint32(data[4:8])
      if flags != 0:
          # Hash-based pyc. We currently refuse to handle checked hash-based
          # pycs. We could validate hash-based pycs against the source, but it
          # seems likely that most people putting hash-based pycs in a zipfile
          # will use unchecked ones.
          if (_imp.check_hash_based_pycs != 'never' and
              (flags != 0x1 or _imp.check_hash_based_pycs == 'always')):
              return None
      elif mtime != 0 and not _eq_mtime(_unpack_uint32(data[8:12]), mtime):
          _bootstrap._verbose_message('{!r} has bad mtime', pathname)
          return None  # signal caller to try alternative
  
      # XXX the pyc's size field is ignored; timestamp collisions are probably
      # unimportant with zip files.
      code = marshal.loads(data[16:])
      if not isinstance(code, _code_type):
          raise TypeError(f'compiled module {pathname!r} is not a code object')
      return code
  
  _code_type = type(_unmarshal_code.__code__)
  
  
  # Replace any occurrences of '\r\n?' in the input string with '\n'.
  # This converts DOS and Mac line endings to Unix line endings.
  def _normalize_line_endings(source):
      source = source.replace(b'\r\n', b'\n')
      source = source.replace(b'\r', b'\n')
      return source
  
  # Given a string buffer containing Python source code, compile it
  # and return a code object.
  def _compile_source(pathname, source):
      source = _normalize_line_endings(source)
      return compile(source, pathname, 'exec', dont_inherit=True)
  
  # Convert the date/time values found in the Zip archive to a value
  # that's compatible with the time stamp stored in .pyc files.
  def _parse_dostime(d, t):
      return time.mktime((
          (d >> 9) + 1980,    # bits 9..15: year
          (d >> 5) & 0xF,     # bits 5..8: month
          d & 0x1F,           # bits 0..4: day
          t >> 11,            # bits 11..15: hours
          (t >> 5) & 0x3F,    # bits 8..10: minutes
          (t & 0x1F) * 2,     # bits 0..7: seconds / 2
          -1, -1, -1))
  
  # Given a path to a .pyc file in the archive, return the
  # modification time of the matching .py file, or 0 if no source
  # is available.
  def _get_mtime_of_source(self, path):
      try:
          # strip 'c' or 'o' from *.py[co]
          assert path[-1:] in ('c', 'o')
          path = path[:-1]
          toc_entry = self._files[path]
          # fetch the time stamp of the .py file for comparison
          # with an embedded pyc time stamp
          time = toc_entry[5]
          date = toc_entry[6]
          return _parse_dostime(date, time)
      except (KeyError, IndexError, TypeError):
          return 0
  
  # Get the code object associated with the module specified by
  # 'fullname'.
  def _get_module_code(self, fullname):
      path = _get_module_path(self, fullname)
      for suffix, isbytecode, ispackage in _zip_searchorder:
          fullpath = path + suffix
          _bootstrap._verbose_message('trying {}{}{}', self.archive, path_sep, fullpath, verbosity=2)
          try:
              toc_entry = self._files[fullpath]
          except KeyError:
              pass
          else:
              modpath = toc_entry[0]
              data = _get_data(self.archive, toc_entry)
              if isbytecode:
                  mtime = _get_mtime_of_source(self, fullpath)
                  code = _unmarshal_code(modpath, data, mtime)
              else:
                  code = _compile_source(modpath, data)
              if code is None:
                  # bad magic number or non-matching mtime
                  # in byte code, try next
                  continue
              modpath = toc_entry[0]
              return code, ispackage, modpath
      else:
          raise ZipImportError(f"can't find module {fullname!r}", name=fullname)
  
  
  class _ZipImportResourceReader:
      """Private class used to support ZipImport.get_resource_reader().
  
      This class is allowed to reference all the innards and private parts of
      the zipimporter.
      """
      _registered = False
  
      def __init__(self, zipimporter, fullname):
          self.zipimporter = zipimporter
          self.fullname = fullname
  
      def open_resource(self, resource):
          fullname_as_path = self.fullname.replace('.', '/')
          path = f'{fullname_as_path}/{resource}'
          from io import BytesIO
          try:
              return BytesIO(self.zipimporter.get_data(path))
          except OSError:
              raise FileNotFoundError(path)
  
      def resource_path(self, resource):
          # All resources are in the zip file, so there is no path to the file.
          # Raising FileNotFoundError tells the higher level API to extract the
          # binary data and create a temporary file.
          raise FileNotFoundError
  
      def is_resource(self, name):
          # Maybe we could do better, but if we can get the data, it's a
          # resource.  Otherwise it isn't.
          fullname_as_path = self.fullname.replace('.', '/')
          path = f'{fullname_as_path}/{name}'
          try:
              self.zipimporter.get_data(path)
          except OSError:
              return False
          return True
  
      def contents(self):
          # This is a bit convoluted, because fullname will be a module path,
          # but _files is a list of file names relative to the top of the
          # archive's namespace.  We want to compare file paths to find all the
          # names of things inside the module represented by fullname.  So we
          # turn the module path of fullname into a file path relative to the
          # top of the archive, and then we iterate through _files looking for
          # names inside that "directory".
          from pathlib import Path
          fullname_path = Path(self.zipimporter.get_filename(self.fullname))
          relative_path = fullname_path.relative_to(self.zipimporter.archive)
          # Don't forget that fullname names a package, so its path will include
          # __init__.py, which we want to ignore.
          assert relative_path.name == '__init__.py'
          package_path = relative_path.parent
          subdirs_seen = set()
          for filename in self.zipimporter._files:
              try:
                  relative = Path(filename).relative_to(package_path)
              except ValueError:
                  continue
              # If the path of the file (which is relative to the top of the zip
              # namespace), relative to the package given when the resource
              # reader was created, has a parent, then it's a name in a
              # subdirectory and thus we skip it.
              parent_name = relative.parent.name
              if len(parent_name) == 0:
                  yield relative.name
              elif parent_name not in subdirs_seen:
                  subdirs_seen.add(parent_name)
                  yield parent_name
  