BUG: consistent datetime display format with < ms #10170

[jreback]

closes #10170

In [3]: Series(date_range('20130101 09:00:00',periods=5,freq='D')) Out[3]: 0 2013-01-01 09:00:00 1 2013-01-02 09:00:00 2 2013-01-03 09:00:00 3 2013-01-04 09:00:00 4 2013-01-05 09:00:00 dtype: datetime64[ns] In [4]: Series(date_range('20130101 09:00:00',periods=5,freq='s')) Out[4]: 0 2013-01-01 09:00:00 1 2013-01-01 09:00:01 2 2013-01-01 09:00:02 3 2013-01-01 09:00:03 4 2013-01-01 09:00:04 dtype: datetime64[ns] In [2]: s = Series(date_range('20130101 09:00:00',periods=5,freq='ms')) In [3]: s.iloc[1] = np.nan In [4]: s Out[4]: 0 2013-01-01 09:00:00.000 1 NaT 2 2013-01-01 09:00:00.002 3 2013-01-01 09:00:00.003 4 2013-01-01 09:00:00.004 dtype: datetime64[ns] In [6]: Series(date_range('20130101 09:00:00',periods=5,freq='us')) Out[6]: 0 2013-01-01 09:00:00.000000 1 2013-01-01 09:00:00.000001 2 2013-01-01 09:00:00.000002 3 2013-01-01 09:00:00.000003 4 2013-01-01 09:00:00.000004 dtype: datetime64[ns] In [7]: Series(date_range('20130101 09:00:00',periods=5,freq='N')) Out[7]: 0 2013-01-01 09:00:00.000000000 1 2013-01-01 09:00:00.000000001 2 2013-01-01 09:00:00.000000002 3 2013-01-01 09:00:00.000000003 4 2013-01-01 09:00:00.000000004 dtype: datetime64[ns] 

[jorisvandenbossche]

Thanks!

Does it make sense to also have the 'milliseconds' resolution? (the third example above, so up to 3 decimals after the comma) instead of at once microsecond

[jreback]

@jorisvandenbossche fixed up for 'ms'. updated the top.

[jorisvandenbossche]

Nice!

[jreback]

@jorisvandenbossche look ok?

[jorisvandenbossche]

yes!