Fails with NumPy < 1.7.0

[darkxanthos]

I tried the first example in the readme:

>>> from xlwings import Workbook, Sheet, Range, Chart
>>> wb = Workbook()  # Creates a connection with a new workbook
>>> Range('A1').value = 'Foo 1'

It fails with error code

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/Library/Python/2.7/site-packages/xlwings/main.py", line 430, in value
    if hasattr(np, 'ndarray') and np.isnan(data):
NotImplementedError: Not implemented for this type

It works if I make it an array:

>>> Range('A1').value = [['Foo 1']]

[fzumstein]

What version of Python and Numpy are you using?

[darkxanthos]

$ python --version
Python 2.7.5
$ python
>>> import numpy
>>> numpy.__version__
'1.6.2'
>>> import xlwings
>>> xlwings.__version__
'0.2.2'

[fzumstein]

I suspect that upgrading to NumPy >=1.8.0 would resolve it, but will look into it over the weekend in case you can't upgrade.

[fzumstein]

The error happens with NumPy < 1.7.0 because np.isnan('string') is returning NotImplementedError instead of TypeError