openpyxlの使い方（背景色と罫線をつける）

openpyxlsample.py

# -*- coding:utf-8 -*-
import openpyxl as ox
# インポートはもっときれいな方法があるかも
from openpyxl.styles.fills import FILL_SOLID
from openpyxl.styles.colors import Color, RED, BLUE
from openpyxl.styles.fills import PatternFill
from openpyxl.styles.borders import Border, Side as BorderSide, BORDER_THIN


# ソースコードはBitbucketにあるので注意。Githubではない。
#   openpyxl==2.0.4
#       https://bitbucket.org/ericgazoni/openpyxl/src/f6e73078b66d/openpyxl/?at=default
book = ox.Workbook()
sheet = book.active
sheet.title = u"お-と-し-ま-え"
sheet.cell("A1").value = u"滝川"

cell = sheet.range("C8")
cell.value = u"ここが色と罫線がつくよ！！！"
cell.style = cell.style.copy(
    fill=PatternFill(
        start_color=Color(RED),
        end_color=Color(RED),
        fill_type=FILL_SOLID,
    ),
    border=cell.style.border.copy(
        left=BorderSide(color=Color(BLUE), style=BORDER_THIN),
        right=BorderSide(color=Color(BLUE), style=BORDER_THIN),
        top=BorderSide(color=Color(BLUE), style=BORDER_THIN),
        bottom=BorderSide(color=Color(BLUE), style=BORDER_THIN),
    ),
)
book.save(filename="hey.xlsx")

it's not work,
TypeError: copy() got an unexpected keyword argument 'fill'