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CLN: prelims for MultiIndex.get_value #31640

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CLN: prelims for MultiIndex.get_value #31640

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CLN: prelims for MultiIndex.get_value
jbrockmendel Feb 4, 2020
b35eeca
Merge branch 'master' of https://github.com/pandas-dev/pandas into mi…
jbrockmendel Feb 5, 2020
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23 changes: 19 additions & 4 deletions pandas/core/indexes/multi.py
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Original file line number Diff line number Diff line change
@@ -1,5 +1,15 @@
from sys import getsizeof
from typing import Any, Hashable, Iterable, List, Optional, Sequence, Tuple, Union
from typing import (
TYPE_CHECKING,
Any,
Hashable,
Iterable,
List,
Optional,
Sequence,
Tuple,
Union,
)
import warnings

import numpy as np
Expand Down Expand Up @@ -27,7 +37,7 @@
pandas_dtype,
)
from pandas.core.dtypes.dtypes import ExtensionDtype
from pandas.core.dtypes.generic import ABCDataFrame
from pandas.core.dtypes.generic import ABCDataFrame, ABCSeries
from pandas.core.dtypes.missing import array_equivalent, isna

import pandas.core.algorithms as algos
Expand Down Expand Up @@ -56,6 +66,9 @@
pprint_thing,
)

if TYPE_CHECKING:
from pandas import Series # noqa:F401

_index_doc_kwargs = dict(ibase._index_doc_kwargs)
_index_doc_kwargs.update(
dict(klass="MultiIndex", target_klass="MultiIndex or list of tuples")
Expand Down Expand Up @@ -2318,8 +2331,10 @@ def reindex(self, target, method=None, level=None, limit=None, tolerance=None):
# --------------------------------------------------------------------
# Indexing Methods

def get_value(self, series, key):
def get_value(self, series: "Series", key):
# Label-based
assert isinstance(series, ABCSeries)

if not is_hashable(key) or is_iterator(key):
# We allow tuples if they are hashable, whereas other Index
# subclasses require scalar.
Expand All @@ -2338,7 +2353,7 @@ def _try_mi(k):
new_index = maybe_droplevels(new_index, k)
return series._constructor(
new_values, index=new_index, name=series.name
).__finalize__(self)
).__finalize__(series)

try:
return _try_mi(key)
Expand Down