repr for PeriodIndex does not handle <=2 elements well (original) (raw)

The repr for PeriodIndex uses ellipses (i.e. ...) for all number of elements. Ellipses should only be used for more than two elements. DatetimeIndex correctly does this:

In [9]: pd.period_range('2013Q1', periods=1, freq="Q")
Out[9]: 
<class 'pandas.tseries.period.PeriodIndex'>
freq: Q-DEC
[2013Q1, ..., 2013Q1]
length: 1

In [11]: pd.period_range('2013Q1', periods=2, freq="Q")
Out[11]: 
<class 'pandas.tseries.period.PeriodIndex'>
freq: Q-DEC
[2013Q1, ..., 2013Q2]
length: 2

In [10]: pd.period_range('2013Q1', periods=3, freq="Q")
Out[10]: 
<class 'pandas.tseries.period.PeriodIndex'>
freq: Q-DEC
[2013Q1, ..., 2013Q3]
length: 3

compare to:

In [16]: pd.date_range('2013-01-01', periods=3, freq="Q")
Out[16]: 
<class 'pandas.tseries.index.DatetimeIndex'>
[2013-03-31 00:00:00, ..., 2013-09-30 00:00:00]
Length: 3, Freq: Q-DEC, Timezone: None

In [13]: pd.date_range('2013-01-01', periods=2, freq="Q")
Out[13]: 
<class 'pandas.tseries.index.DatetimeIndex'>
[2013-03-31 00:00:00, 2013-06-30 00:00:00]
Length: 2, Freq: Q-DEC, Timezone: None

In [14]: pd.date_range('2013-01-01', periods=1, freq="Q")
Out[14]: 
<class 'pandas.tseries.index.DatetimeIndex'>
[2013-03-31 00:00:00]
Length: 1, Freq: Q-DEC, Timezone: None