Financial Plots in Python -

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i trying graph candlestick stock charts in python. code have works fine except last line generates error message , don't know how fix it. appreciate help.

import plotly plotly.__version__   import plotly.plotly py plotly.tools import figurefactory ff datetime import datetime  import pandas.io.data web  df = web.datareader("aapl", 'yahoo', datetime(2007, 10, 1), datetime(2009, 4, 1)) fig = ff.create_candlestick(df.open, df.high, df.low, df.close, dates=df.index) py.iplot(fig, filename='finance_aapl_candlestick', validate=false)  >>> py.iplot(fig, filename='finance_aapl_candlestick', validate=false) traceback (most recent call last):   file "<stdin>", line 1, in <module>   file "c:\python27\lib\site-packages\plotly\plotly\plotly.py", line 151, in iplot     url = plot(figure_or_data, **plot_options)   file "c:\python27\lib\site-packages\plotly\plotly\plotly.py", line 241, in plot     res = _send_to_plotly(figure, **plot_options)   file "c:\python27\lib\site-packages\plotly\plotly\plotly.py", line 1374, in _send_to_plotly     cls=utils.plotlyjsonencoder)   file "c:\python27\lib\json\__init__.py", line 250, in dumps     sort_keys=sort_keys, **kw).encode(obj)   file "c:\python27\lib\site-packages\plotly\utils.py", line 145, in encode     encoded_o = super(plotlyjsonencoder, self).encode(o)   file "c:\python27\lib\json\encoder.py", line 207, in encode     chunks = self.iterencode(o, _one_shot=true)   file "c:\python27\lib\json\encoder.py", line 270, in iterencode     return _iterencode(o, 0)   file "c:\python27\lib\site-packages\plotly\utils.py", line 208, in default     return encoding_method(obj)   file "c:\python27\lib\site-packages\plotly\utils.py", line 270, in encode_as_datetime     obj = obj.astimezone(pytz.utc)   file "tslib.pyx", line 288, in pandas.tslib.timestamp.tz_convert (pandas\tslib.c:7178) exception: cannot convert tz-naive timestamp, use tz_localize localize

the last entry in stack trace indicates timestamps missing time zone information. see http://pandas.pydata.org/pandas-docs/stable/timeseries.html#time-zone-handling

in particular, @ tz_localize @ in [301]: near bottom of page.


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