Cannot write cell value using numpy

Created originally on Bitbucket by CoryKramer (Cory Kramer)

The following code works without issue

#!python

import openpyxl

workbook = openpyxl.Workbook()
sheet = workbook.create_sheet('Test')
sheet.cell(row=1, column=1).value = 1.0

However the following version of this code causes an error

#!python

import numpy
import openpyxl

workbook = openpyxl.Workbook()
sheet = workbook.create_sheet('Test')
a = numpy.array([1.0])
sheet.cell(row=1, column=1).value = a[0]

In the latter case, the value being assigned is of type numpy.float64. In the Cell._bind_value method, this type is not considered to be NUMERIC_TYPES so therefore causes a ValueError at the end of the method.