8000 Inconsistent behavior initializing DatetimeIndex to tz with list/array of string times · Issue #4229 · pandas-dev/pandas · GitHub
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Inconsistent behavior initializing DatetimeIndex to tz with list/array of string times #4229

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rockg opened this issue Jul 13, 2013 · 1 comment
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Inconsistent behavior initializing DatetimeIndex to tz with list/array of string times #4229

rockg opened this issue Jul 13, 2013 · 1 comment
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0.12

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@rockg
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rockg commented Jul 13, 2013

Initializing a DatetimeIndex with a list of strings behaves differently than initializing with a numpy array of strings. To me these should behave the same and I personally like the list behavior better. My understanding of the tz argument to DatetimeIndex is that it is localizing rather than converting in which case the numpy array case is inconsistent. I don't think there should be an assumption made about the tz of the strings before indicating it by localizing.

>>> idx = ['11/10/2005 08:00:00','11/10/2005 09:00:00']
>>> DatetimeIndex(idx, tz='US/Eastern')
<class 'pandas.tseries.index.DatetimeIndex'>
[2005-11-10 08:00:00, 2005-11-10 09:00:00]
Length: 2, Freq: None, Timezone: US/Eastern
>>> import numpy as np
>>> idxnp = np.array(idx)
>>> DatetimeIndex(idxnp, tz='US/Eastern')
<class 'pandas.tseries.index.DatetimeIndex'>
[2005-11-10 03:00:00, 2005-11-10 04:00:00]
Length: 2, Freq: None, Timezone: US/Eastern
@jorisvandenbossche jorisvandenbossche mentioned this issue Jul 13, 2013
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jorisvandenbossche added a commit to jorisvandenbossche/pandas that referenced this issue Jul 14, 2013
@jorisvandenbossche
BUG: initialize DatetimeIndex with array of strings (pandas-dev#4229)
46ba51f
jreback added a commit that referenced this issue Jul 14, 2013
@jreback
Merge pull request #4234 from jorisvandenbossche/bug-datetimeindex-li…
35312e4 
…st-array

BUG: initialize DatetimeIndex with array of strings (#4229)
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jreback commented Jul 14, 2013

closed via #4234

@jreback jreback closed this as completed Jul 14, 2013
yarikoptic added a commit to neurodebian/pandas that referenced this issue Jul 25, 2013
@yarikoptic
Merge commit 'v0.12.0rc1-79-g50eff60' into debian
0dfc597 
* commit 'v0.12.0rc1-79-g50eff60': (23 commits)
  CLN: replace __repr__ with __unicode__ for string printing (to use StringMixIn)
  BLD: use wheels and newer scipy bc of 33 scipy issue
  TST: force rebuild
  TST: remove fudgy ujson test pandas-dev#4223
  BUG: initialize DatetimeIndex with array of strings (pandas-dev#4229)
  BUG: set name attr in DatetimeIndex and PeriodIndex
  Updated release note about GH4216.
  Check if a plotting DataFrame with kind='kde' has a legend. GH4216
  BUG: Display the legend when calling plot with kind='density'. GH4216
  TST/BUG: disallow bs4==4.2.0 and skip assoc tests
  BLD: test_perf tweaks
  CLN: correct format string
  DOC: release notes
  BUG: raise on invalid colormap for older mpl
  TST: little endian failure, GH4222
  CLN/ENH: clean up docstrings remove some cruft and generalize
  BLD: Turn off the ISRELEASED flag in setup.py
  DOC: minor io.rst edits
  DOC: remove savefig width parameter (pandas-dev#4203)
  BLD: pip 1.4 is coming, preempt issues
  ...
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