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CLN: remove unsupported sparse code from io.pytables #29863

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merged 3 commits into from
Nov 27, 2019
Merged

CLN: remove unsupported sparse code from io.pytables #29863

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7d8ee58
CLN: remove unsupported sparse code from io.pytables
jbrockmendel Nov 26, 2019
4397e00
mypy fixup
jbrockmendel Nov 26, 2019
439a6ed
Merge branch 'master' of https://github.com/pandas-dev/pandas into cl…
jbrockmendel Nov 27, 2019
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39 changes: 4 additions & 35 deletions pandas/io/pytables.py
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Original file line number Diff line number Diff line change
Expand Up @@ -44,7 +44,6 @@
isna,
)
from pandas.core.arrays.categorical import Categorical
from pandas.core.arrays.sparse import BlockIndex, IntIndex
import pandas.core.common as com
from pandas.core.computation.pytables import PyTablesExpr, maybe_expression
from pandas.core.index import ensure_index
Expand Down Expand Up @@ -2770,31 +2769,21 @@ def read_array(
else:
return ret

def read_index(self, key, **kwargs):
def read_index(self, key: str, **kwargs) -> Index:
variety = _ensure_decoded(getattr(self.attrs, f"{key}_variety"))

if variety == "multi":
return self.read_multi_index(key, **kwargs)
elif variety == "block":
return self.read_block_index(key, **kwargs)
elif variety == "sparseint":
return self.read_sparse_intindex(key, **kwargs)
elif variety == "regular":
_, index = self.read_index_node(getattr(self.group, key), **kwargs)
return index
else: # pragma: no cover
raise TypeError(f"unrecognized index variety: {variety}")

def write_index(self, key, index):
def write_index(self, key: str, index: Index):
if isinstance(index, MultiIndex):
setattr(self.attrs, f"{key}_variety", "multi")
self.write_multi_index(key, index)
elif isinstance(index, BlockIndex):
setattr(self.attrs, f"{key}_variety", "block")
self.write_block_index(key, index)
elif isinstance(index, IntIndex):
setattr(self.attrs, f"{key}_variety", "sparseint")
self.write_sparse_intindex(key, index)
else:
setattr(self.attrs, f"{key}_variety", "regular")
converted = _convert_index(
Expand All @@ -2810,32 +2799,12 @@ def write_index(self, key, index):
if isinstance(index, (DatetimeIndex, PeriodIndex)):
node._v_attrs.index_class = self._class_to_alias(type(index))

if hasattr(index, "freq"):
if isinstance(index, (DatetimeIndex, PeriodIndex, TimedeltaIndex)):
node._v_attrs.freq = index.freq

if hasattr(index, "tz") and index.tz is not None:
if isinstance(index, DatetimeIndex) and index.tz is not None:
node._v_attrs.tz = _get_tz(index.tz)

def write_block_index(self, key, index):
self.write_array(f"{key}_blocs", index.blocs)
self.write_array(f"{key}_blengths", index.blengths)
setattr(self.attrs, f"{key}_length", index.length)

def read_block_index(self, key, **kwargs) -> BlockIndex:
length = getattr(self.attrs, f"{key}_length")
blocs = self.read_array(f"{key}_blocs", **kwargs)
blengths = self.read_array(f"{key}_blengths", **kwargs)
return BlockIndex(length, blocs, blengths)

def write_sparse_intindex(self, key, index):
self.write_array(f"{key}_indices", index.indices)
setattr(self.attrs, f"{key}_length", index.length)

def read_sparse_intindex(self, key, **kwargs) -> IntIndex:
length = getattr(self.attrs, f"{key}_length")
indices = self.read_array(f"{key}_indices", **kwargs)
return IntIndex(length, indices)

def write_multi_index(self, key, index):
setattr(self.attrs, f"{key}_nlevels", index.nlevels)

Expand Down