BinGrouper AttributeError when returning a Series from DataFrame.apply #2300

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dalejung opened this issue Nov 20, 2012 · 0 comments

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dalejung commented Nov 20, 2012

http://nbviewer.ipython.org/4118124/

import pandas as pd
from pandas.tseries.resample import TimeGrouper

N = 1000
ind = pd.date_range(start="2000-01-01", freq="D", periods=N)
df = pd.DataFrame({'open':1, 'close':2}, index=ind)
tg = TimeGrouper('M')
grouper = tg.get_grouper(df)
# Errors
df.groupby(grouper).apply(lambda df: df['close'] / df['open'])
# AttributeError: 'BinGrouper' object has no attribute 'groupings'

Error does not occur for regular Grouper.

ghost assigned wesm

wesm mentioned this issue

Make simpler API for using resampling infrastructure to do general gropuby #2450

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wesm closed this as completed in

ec86497

jbrockmendel mentioned this issue

Use align_method in comp_method_FRAME #22880

Merged

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