Resampler.nunique()
pandas.tseries.resample.Resampler.nunique
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Resampler.nunique(_method='nunique')
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Returns number of unique elements in the group
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© 2008–2014 the pandas development team
Licensed under the 3-clause BSD License.
http://pandas.pydata.org/pandas-docs/version/0.18.1/generated/pandas.tseries.resample.Resampler.nunique.html