Issues with lineChart about django-nvd3 HOT 2 CLOSED

We will suggest you to use "Discrete Bar Chart" as this chart have x-axis with non number format.

from django-nvd3.

I didn't realize that it wasn't possible to display text on the x-axis on a lineChart. But I really would like to use a linechart. So I've come up with this:
{'charttdata': {'y1': [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0], 'x': [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12], 'name1': 'Fabian'}, 'charttype': 'lineChart'}
And it gives me this error:
http://dpaste.com/hold/1290626/
I also tried this:
{'charttype': 'lineChart', 'charttdata': {'name1': 'Fabian', 'x': [datetime.date(2013, 1, 1), datetime.date(2013, 2, 1), datetime.date(2013, 3, 1), datetime.date(2013, 4, 1), datetime.date(2013, 5, 1), datetime.date(2013, 6, 1), datetime.date(2013, 7, 1), datetime.date(2013, 8, 1), datetime.date(2013, 9, 1), datetime.date(2013, 10, 1), datetime.date(2013, 11, 1), datetime.date(2013, 12, 1)], 'y1': [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]}}
And it gives me this error:
http://dpaste.com/hold/1290629/

I'm also really confused what this error is supposed to mean.

from django-nvd3.