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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 touch(name, atime=None, mtime=None, makedirs=False):
    '''
    Replicate the 'nix "touch" command to create a new empty
    file or update the atime and mtime of an existing file.

    Note that if you just want to create a file and don't care about atime or
    mtime, you should use ``file.managed`` instead, as it is more
    feature-complete.  (Just leave out the ``source``/``template``/``contents``
    arguments, and it will just create the file and/or check its permissions,
    without messing with contents)

    name
        name of the file

    atime
        atime of the file

    mtime
        mtime of the file

    makedirs
        whether we should create the parent directory/directories in order to
        touch the file

    Usage:

    .. code-block:: yaml

        /var/log/httpd/logrotate.empty:
          file.touch

    .. versionadded:: 0.9.5
    '''
    name = os.path.expanduser(name)

    ret = {
        'name': name,
        'changes': {},
    }
    if not name:
        return _error(ret, 'Must provide name to file.touch')
    if not os.path.isabs(name):
        return _error(
            ret, 'Specified file {0} is not an absolute path'.format(name)
        )

    if __opts__['test']:
        ret.update(_check_touch(name, atime, mtime))
        return ret

    if makedirs:
        try:
            _makedirs(name=name)
        except CommandExecutionError as exc:
            return _error(ret, 'Drive {0} is not mapped'.format(exc.message))
    if not os.path.isdir(os.path.dirname(name)):
        return _error(
            ret, 'Directory not present to touch file {0}'.format(name)
        )

    extant = os.path.exists(name)

    ret['result'] = __salt__['file.touch'](name, atime, mtime)
    if not extant and ret['result']:
        ret['comment'] = 'Created empty file {0}'.format(name)
        ret['changes']['new'] = name
    elif extant and ret['result']:
        ret['comment'] = 'Updated times on {0} {1}'.format(
            'directory' if os.path.isdir(name) else 'file', name
        )
        ret['changes']['touched'] = name

    return ret