How to use the send2trash.compat.environb function in Send2Trash

fsencode = os.fsencode   # Python 3
    fsdecode = os.fsdecode
except AttributeError:
    def fsencode(u):         # Python 2
        return u.encode(sys.getfilesystemencoding())
    def fsdecode(b):
        return b.decode(sys.getfilesystemencoding())
    # The Python 3 versions are a bit smarter, handling surrogate escapes,
    # but these should work in most cases.

FILES_DIR = b'files'
INFO_DIR = b'info'
INFO_SUFFIX = b'.trashinfo'

# Default of ~/.local/share [3]
XDG_DATA_HOME = op.expanduser(environb.get(b'XDG_DATA_HOME', b'~/.local/share'))
HOMETRASH_B = op.join(XDG_DATA_HOME, b'Trash')
HOMETRASH = fsdecode(HOMETRASH_B)

uid = os.getuid()
TOPDIR_TRASH = b'.Trash'
TOPDIR_FALLBACK = b'.Trash-' + text_type(uid).encode('ascii')

def is_parent(parent, path):
    path = op.realpath(path) # In case it's a symlink
    if isinstance(path, text_type):
        path = fsencode(path)
    parent = op.realpath(parent)
    if isinstance(parent, text_type):
        parent = fsencode(parent)
    return path.startswith(parent)