How to use the beets.util.syspath function in beets

def find_key(self, items, write=False):
        overwrite = self.config['overwrite'].get(bool)
        bin = util.bytestring_path(self.config['bin'].get(unicode))

        for item in items:
            if item['initial_key'] and not overwrite:
                continue

            try:
                output = util.command_output([bin, b'-f',
                                              util.syspath(item.path)])
            except (subprocess.CalledProcessError, OSError) as exc:
                self._log.error(u'execution failed: {0}', exc)
                continue
            except UnicodeEncodeError:
                # Workaround for Python 2 Windows bug.
                # http://bugs.python.org/issue1759845
                self._log.error(u'execution failed for Unicode path: {0!r}',
                                item.path)
                continue

            key_raw = output.rsplit(None, 1)[-1]
            try:
                key = key_raw.decode('utf8')
            except UnicodeDecodeError:
                self._log.error(u'output is invalid UTF-8')
                continue

"""
        # Construct shell command. The "-o" option makes the output
        # easily parseable (tab-delimited). "-s s" forces gain
        # recalculation even if tags are already present and disables
        # tag-writing; this turns the mp3gain/aacgain tool into a gain
        # calculator rather than a tag manipulator because we take care
        # of changing tags ourselves.
        cmd = [self.command, '-o', '-s', 's']
        if self.noclip:
            # Adjust to avoid clipping.
            cmd = cmd + ['-k']
        else:
            # Disable clipping warning.
            cmd = cmd + ['-c']
        cmd = cmd + ['-d', str(int(target_level - 89))]
        cmd = cmd + [syspath(i.path) for i in items]

        self._log.debug(u'analyzing {0} files', len(items))
        self._log.debug(u"executing {0}", " ".join(map(displayable_path, cmd)))
        output = call(cmd).stdout
        self._log.debug(u'analysis finished')
        return self.parse_tool_output(output,
                                      len(items) + (1 if is_album else 0))

def check_art_similarity(log, item, imagepath, compare_threshold):
    """A boolean indicating if an image is similar to embedded item art.
    """
    with NamedTemporaryFile(delete=True) as f:
        art = extract(log, f.name, item)

        if art:
            is_windows = platform.system() == "Windows"

            # Converting images to grayscale tends to minimize the weight
            # of colors in the diff score.
            convert_proc = subprocess.Popen(
                [b'convert', syspath(imagepath), syspath(art),
                 b'-colorspace', b'gray', b'MIFF:-'],
                stdout=subprocess.PIPE,
                close_fds=not is_windows,
            )
            compare_proc = subprocess.Popen(
                [b'compare', b'-metric', b'PHASH', b'-', b'null:'],
                stdin=convert_proc.stdout,
                stdout=subprocess.PIPE,
                stderr=subprocess.PIPE,
                close_fds=not is_windows,
            )
            convert_proc.stdout.close()

            stdout, stderr = compare_proc.communicate()
            if compare_proc.returncode:
                if compare_proc.returncode != 1:

if path is None:
            path = self.path
        else:
            path = normpath(path)

        # Get the data to write to the file.
        item_tags = dict(self)
        item_tags = {k: v for k, v in item_tags.items()
                     if k in self._media_fields}  # Only write media fields.
        if tags is not None:
            item_tags.update(tags)
        plugins.send('write', item=self, path=path, tags=item_tags)

        # Open the file.
        try:
            mediafile = MediaFile(syspath(path),
                                  id3v23=beets.config['id3v23'].get(bool))
        except UnreadableFileError as exc:
            raise ReadError(self.path, exc)

        # Write the tags to the file.
        mediafile.update(item_tags)
        try:
            mediafile.save()
        except UnreadableFileError as exc:
            raise WriteError(self.path, exc)

        # The file has a new mtime.
        if path == self.path:
            self.mtime = self.current_mtime()
        plugins.send('after_write', item=self, path=path)

def get(self, album, plugin, paths):
        """Look for album art files in the specified directories.
        """
        if not paths:
            return
        cover_names = list(map(util.bytestring_path, plugin.cover_names))
        cover_names_str = b'|'.join(cover_names)
        cover_pat = br''.join([br"(\b|_)(", cover_names_str, br")(\b|_)"])

        for path in paths:
            if not os.path.isdir(syspath(path)):
                continue

            # Find all files that look like images in the directory.
            images = []
            ignore = config['ignore'].as_str_seq()
            ignore_hidden = config['ignore_hidden'].get(bool)
            for _, _, files in sorted_walk(path, ignore=ignore,
                                           ignore_hidden=ignore_hidden):
                for fn in files:
                    fn = bytestring_path(fn)
                    for ext in IMAGE_EXTENSIONS:
                        if fn.lower().endswith(b'.' + ext) and \
                           os.path.isfile(syspath(os.path.join(path, fn))):
                            images.append(fn)

            # Look for "preferred" filenames.

def write_file_mtime(self, path, mtime):
        """Write the given mtime to the destination path.
        """
        stat = os.stat(util.syspath(path))
        os.utime(util.syspath(path), (stat.st_atime, mtime))

help='include the default configuration'
)
config_cmd.func = config_func
default_commands.append(config_cmd)


# completion: print completion script

def print_completion(*args):
    for line in completion_script(default_commands + plugins.commands()):
        print(line, end='')
    if not any(map(os.path.isfile, BASH_COMPLETION_PATHS)):
        log.warn(u'Warning: Unable to find the bash-completion package. '
                 u'Command line completion might not work.')

BASH_COMPLETION_PATHS = map(syspath, [
    u'/etc/bash_completion',
    u'/usr/share/bash-completion/bash_completion',
    u'/usr/share/local/bash-completion/bash_completion',
    u'/opt/local/share/bash-completion/bash_completion',  # SmartOS
    u'/usr/local/etc/bash_completion',  # Homebrew
])


def completion_script(commands):
    """Yield the full completion shell script as strings.

    ``commands`` is alist of ``ui.Subcommand`` instances to generate
    completion data for.
    """
    base_script = os.path.join(_package_path('beets.ui'), 'completion_base.sh')
    with open(base_script, 'r') as base_script:

def pil_resize(maxwidth, path_in, path_out=None):
    """Resize using Python Imaging Library (PIL).  Return the output path
    of resized image.
    """
    path_out = path_out or temp_file_for(path_in)
    from PIL import Image
    log.debug(u'artresizer: PIL resizing {0} to {1}',
              util.displayable_path(path_in), util.displayable_path(path_out))

    try:
        im = Image.open(util.syspath(path_in))
        size = maxwidth, maxwidth
        im.thumbnail(size, Image.ANTIALIAS)
        im.save(path_out)
        return path_out
    except IOError:
        log.error(u"PIL cannot create thumbnail for '{0}'",
                  util.displayable_path(path_in))
        return path_in

# Get the destination of the first item (track) of the album, we use
        # this function to format the path accordingly to path_formats.
        dest = album_item.destination(basedir=dest_dir,
                                      path_formats=path_formats)

        # Remove item from the path.
        dest = os.path.join(*util.components(dest)[:-1])

        dest = album.art_destination(album.artpath, item_dir=dest)
        if album.artpath == dest:
            return

        if not pretend:
            util.mkdirall(dest)

        if os.path.exists(util.syspath(dest)):
            self._log.info(u'Skipping {0} (target file exists)',
                           util.displayable_path(album.artpath))
            return

        # Decide whether we need to resize the cover-art image.
        resize = False
        maxwidth = None
        if self.config['album_art_maxwidth']:
            maxwidth = self.config['album_art_maxwidth'].get(int)
            size = ArtResizer.shared.get_size(album.artpath)
            self._log.debug('image size: {}', size)
            if size:
                resize = size[0] > maxwidth
            else:
                self._log.warning(u'Could not get size of image (please see '
                                  u'documentation for dependencies).')