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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:

def diskusage(*args):
    '''
    Return the disk usage for this minion

    Usage::

        salt '*' status.diskusage [paths and/or filesystem types]

    CLI Example:

    .. code-block:: bash

        salt '*' status.diskusage         # usage for all filesystems
        salt '*' status.diskusage / /tmp  # usage for / and /tmp
        salt '*' status.diskusage ext?    # usage for ext[234] filesystems
        salt '*' status.diskusage / ext?  # usage for / and all ext filesystems
    '''
    selected = set()
    fstypes = set()
    if not args:
        # select all filesystems
        fstypes.add('*')
    else:
        for arg in args:
            if arg.startswith('/'):
                # select path
                selected.add(arg)
            else:
                # select fstype
                fstypes.add(arg)

    if fstypes:
        # determine which mount points host the specified fstypes
        regex = re.compile(
            '|'.join(
                fnmatch.translate(fstype).format('(%s)') for fstype in fstypes
            )
        )
        # ifile source of data varies with OS, otherwise all the same
        if __grains__['kernel'] == 'Linux':
            try:
                with salt.utils.files.fopen('/proc/mounts', 'r') as fp_:
                    ifile = salt.utils.stringutils.to_unicode(fp_.read()).splitlines()
            except OSError:
                return {}
        elif __grains__['kernel'] in ('FreeBSD', 'SunOS'):
            ifile = __salt__['cmd.run']('mount -p').splitlines()
        else:
            raise CommandExecutionError('status.diskusage not yet supported on this platform')

        for line in ifile:
            comps = line.split()
            if __grains__['kernel'] == 'SunOS':
                if len(comps) >= 4:
                    mntpt = comps[2]
                    fstype = comps[3]
                    if regex.match(fstype):
                        selected.add(mntpt)
            else:
                if len(comps) >= 3:
                    mntpt = comps[1]
                    fstype = comps[2]
                    if regex.match(fstype):
                        selected.add(mntpt)

    # query the filesystems disk usage
    ret = {}
    for path in selected:
        fsstats = os.statvfs(path)
        blksz = fsstats.f_bsize
        available = fsstats.f_bavail * blksz
        total = fsstats.f_blocks * blksz
        ret[path] = {"available": available, "total": total}
    return ret