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PERF: copy blklocs/blknos in BlockManager.apply #43185

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Merged
jreback merged 3 commits into from
Aug 31, 2021
Merged

PERF: copy blklocs/blknos in BlockManager.apply #43185

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PERF: copy blklocs/blknos in BlockManager.apply
jbrockmendel Aug 23, 2021
f7bd7b6
Merge branch 'master' of https://github.com/pandas-dev/pandas into pe…
jbrockmendel Aug 24, 2021
a397433
only for copy
jbrockmendel Aug 24, 2021
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9 changes: 8 additions & 1 deletion pandas/core/internals/managers.py
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Original file line number Diff line number Diff line change
Expand Up @@ -330,7 +330,8 @@ def apply(
if ignore_failures:
return self._combine(result_blocks)

return type(self).from_blocks(result_blocks, self.axes)
out = type(self).from_blocks(result_blocks, self.axes)
return out

def where(self: T, other, cond, align: bool, errors: str) -> T:
if align:
Expand Down Expand Up @@ -589,8 +590,14 @@ def copy_func(ax):
new_axes = list(self.axes)

res = self.apply("copy", deep=deep)

res.axes = new_axes

if self.ndim > 1:
# Avoid needing to re-compute these
res._blknos = self.blknos.copy()
res._blklocs = self.blklocs.copy()

if deep:
res._consolidate_inplace()
return res
Expand Down