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Adding an offset to a timezone-aware DatetimeIndex shifts the times #1838

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ijmcf opened this issue Sep 4, 2012 · 0 comments
Closed

Adding an offset to a timezone-aware DatetimeIndex shifts the times #1838

ijmcf opened this issue Sep 4, 2012 · 0 comments
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0.9

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@ijmcf
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ijmcf commented Sep 4, 2012

For example:

dr = pandas.date_range('03/06/2012 00:00', periods=25, freq='W-FRI', tz='US/Eastern')
<class 'pandas.tseries.index.DatetimeIndex'>
[2012-03-09 00:00:00, ..., 2012-08-24 00:00:00]
Length: 25, Freq: W-FRI, Timezone: US/Eastern

dr + pandas.datetools.BDay()
<class 'pandas.tseries.index.DatetimeIndex'>
[2012-03-12 05:00:00, ..., 2012-08-27 04:00:00]
Length: 25, Freq: None, Timezone: US/Eastern

Contrast with a timezone-naive DatetimeIndex:

dr = pandas.date_range('03/06/2012 00:00', periods=25, freq='W-FRI')
<class 'pandas.tseries.index.DatetimeIndex'>
[2012-03-09 00:00:00, ..., 2012-08-24 00:00:00]
Length: 25, Freq: W-FRI, Timezone: None

dr + pandas.datetools.BDay()
<class 'pandas.tseries.index.DatetimeIndex'>
[2012-03-12 00:00:00, ..., 2012-08-27 00:00:00]
Length: 25, Freq: W-MON, Timezone: None
@ghost ghost assigned changhiskhan Sep 18, 2012
wesm added a commit that referenced this issue Sep 19, 2012
@wesm
Merge remote-tracking branch 'chang/fixedoffset'
667220a 
* chang/fixedoffset:
  BUG: more fixedoffset occurrences #1928
  BUG: no zone in tzinfo #1838
@wesm wesm closed this as completed Sep 19, 2012
changhiskhan pushed a commit that referenced this issue Sep 20, 2012
@wesm
BUG: DatetimeIndex localizes twice if input is localized DatetimeIndex …
b9848a6 
…#1838
wesm added a commit that referenced this issue Sep 25, 2012
@wesm
Merge branch 'master' into c-parser
c69c4f0 
* master: (171 commits)
  BUG: fix Cython tz_convert bug with time zones that haven't had a UTC transition in a long time. close #1946
  BUG: fix buglet
  BUG: try fixing tzlocal bug
  Minor fixes to time series doc.
  Adding DataFrame methods to API reference.
  Added Series functions to API doc.
  BUG: fix segfault in SeriesGrouper with non-contiguous index
  RLS: Version 0.9.0 Release Candidate 1
  BLD: add lib depends #1945
  BUG: missing case for assigning DataFrame via ix
  BUG: python 3.1 timedelta compat issue
  BUG: python 3 tzoffset is not hashable
  TST: adds dateutil to travis-ci install commands
  BUG: let selecting multiple columns in DataFrame.__getitem__ work when there are duplicates. close #1943
  BUG: DatetimeConverter does not handle datetime64 arrays properly
  BUG: reindex with axis=1 when setting Series to scalar location, close #1942
  BUG: fix formatting of Timestamps in to_html/IPython notebook. refactor to_html code. close #1940
  ENH: allow single str input to na_values #1944
  TST: when xlrd is not installed skip tests needing it, close #1941
  BUG: DatetimeIndex localizes twice if input is localized DatetimeIndex #1838
  ...
yarikoptic added a commit to neurodebian/pandas that referenced this issue Sep 27, 2012
@yarikoptic
Merge tag 'v0.9.0rc1' into debian
9b68f22 
Version 0.9.0 Release Candidate 1

* tag 'v0.9.0rc1': (58 commits)
  RLS: Version 0.9.0 Release Candidate 1
  BLD: add lib depends pandas-dev#1945
  BUG: missing case for assigning DataFrame via ix
  BUG: python 3.1 timedelta compat issue
  BUG: python 3 tzoffset is not hashable
  TST: adds dateutil to travis-ci install commands
  BUG: let selecting multiple columns in DataFrame.__getitem__ work when there are duplicates. close pandas-dev#1943
  BUG: DatetimeConverter does not handle datetime64 arrays properly
  BUG: reindex with axis=1 when setting Series to scalar location, close pandas-dev#1942
  BUG: fix formatting of Timestamps in to_html/IPython notebook. refactor to_html code. close pandas-dev#1940
  ENH: allow single str input to na_values pandas-dev#1944
  TST: when xlrd is not installed skip tests needing it, close pandas-dev#1941
  BUG: DatetimeIndex localizes twice if input is localized DatetimeIndex pandas-dev#1838
  BUG: align input on setting via ix pandas-dev#1630
  cython methods for group bins pandas-dev#1809
  BUG: allow non-numeric columns in groupby first/last pandas-dev#1809
  TST: skip unicode filename test if system requires encoding to ascii
  BUG: more fixedoffset occurrences pandas-dev#1928
  BUG: no zone in tzinfo pandas-dev#1838
  BUG: handle lists too in DataFrame.xs when partially selecting data from DataFrame. close pandas-dev#1796
  ...
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