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fix for BUG: grouping with tz-aware: Values falls after last bin #24973

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Jan 29, 2019
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fix for BUG: grouping with tz-aware: Values falls after last bin #24973

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1940cfd
fix #24972
ahcub Jan 28, 2019
dd42200
improve comment
ahcub Jan 28, 2019
f8cb89a
add entry to what's new
ahcub Jan 28, 2019
eccca8e
add test for issue 24972
ahcub Jan 28, 2019
0454dc3
remove import
ahcub Jan 28, 2019
b009f17
change fix for values fall after last bin
ahcub Jan 28, 2019
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fix imports
ahcub Jan 28, 2019
dda1c5c
fix imports
ahcub Jan 28, 2019
3edb267
change the description
ahcub Jan 28, 2019
c0bc3a5
move test from groupby to timegrouper
ahcub Jan 28, 2019
e631821
fix typo
ahcub Jan 28, 2019
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move tests
ahcub Jan 28, 2019
df7d650
chagne the bug fix description
ahcub Jan 29, 2019
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Merge branch 'master' into master
ahcub Jan 29, 2019
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Merge branch 'master' into master
ahcub Jan 29, 2019
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remove the record that is not on master anymore
ahcub Jan 29, 2019
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fix #24972
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@ahcub
ahcub committed Jan 28, 2019
commit 1940cfd6b387ca427c46b02c0e547250cbc6ac10
10 changes: 10 additions & 0 deletions pandas/core/resample.py
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Expand Up @@ -1413,6 +1413,16 @@ def _get_time_bins(self, ax):
ambiguous='infer',
nonexistent='shift_forward')

# GH #24972
# In edge case of tz-aware grouping binner last index can be
# less than the ax.max() variable in data object, this happens
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should go in _adjust_bin_edges

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there are a lot of issues with generating the remaining bins when I try to move it there. if this way of generating the bins is the correct one then I believe that it is better to leave it here. in _adjust_bin_edges we lose information about ax tz

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Or this should possibly be fixed in _get_timestamp_range_edges. This patch here seems like a bandaid.

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@ahcub ahcub Jan 28, 2019 •
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ok, let me apply the patch you suggested in the issue description, it does look better for me.

# because of normalization
if len(binner) > 1 and binner[-1] < ax.max():
extra_date_range = pd.date_range(binner[-1], ax.max() + self.freq,
freq=self.freq, tz=binner[-1].tz,
name=ax.name)
binner = labels = binner.append(extra_date_range[1:])

ax_values = ax.asi8
binner, bin_edges = self._adjust_bin_edges(binner, ax_values)

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