__doc__ not writable in Python 3.2, simple fix.
__doc__ not writable in Python 3.2, simple fix.

plotly/plotly.py,plotly/plotly.py,plotly/python-api,plotly/python-api,plotly/python-api,plotly/plotly.py,ee-in/python-api,ee-in/python-api,ee-in/python-api