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concat() drops index when used on series with a PeriodIndex #1815

jmloser opened this issue Aug 27, 2012 · 1 comment


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commented Aug 27, 2012

New to this, sorry if I'm just missing something...

import numpy as np
import pandas as pd

d1 = pd.date_range('12/31/1990', '12/31/1999', freq='A-DEC')
d2 = pd.date_range('12/31/2000', '12/31/2009', freq='A-DEC')

s1 = pd.Series(np.random.randn(10), d1)
s2 = pd.Series(np.random.randn(10), d2)

# works

s1 = s1.to_period()
s2 = s2.to_period()

# drops index

# workaround
pd.concat([s1.to_timestamp(), s2.to_timestamp()]).to_period('A-DEC')

@wesm wesm closed this in f953727 Sep 10, 2012


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commented Sep 10, 2012

Nope. This is a bug-- just pushed a fix. Thanks for the report

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