Closed
Description
Code Sample, a copy-pastable example if possible
In [2]: d = pd.DataFrame([[1, 1, 3],
...: [1, 2, 4],
...: [2, 2, 5]], columns=['a', 'b', 'c'])
In [3]: d.set_index(['a', 'b']).loc[pd.Series([1, 2])]
Out[3]:
c
a b
1 1 3
2 4
2 2 5
In [4]: d.set_index(['a', 'b']).loc[pd.Series([1, 2], index=[2,0])]
Out[4]:
c
a b
1 1 3
2 4
2 2 5
In [5]: d.set_index(['a', 'b']).loc[pd.Series([1, 2], index=[2,3])]
---------------------------------------------------------------------------
KeyError Traceback (most recent call last)
<ipython-input-5-a23ad44827f6> in <module>()
----> 1 d.set_index(['a', 'b']).loc[pd.Series([1, 2], index=[2,3])]
/home/pietro/nobackup/repo/pandas/pandas/core/indexing.py in __getitem__(self, key)
1339 else:
1340 key = com._apply_if_callable(key, self.obj)
-> 1341 return self._getitem_axis(key, axis=0)
1342
1343 def _is_scalar_access(self, key):
/home/pietro/nobackup/repo/pandas/pandas/core/indexing.py in _getitem_axis(self, key, axis)
1527 if isinstance(labels, MultiIndex):
1528 if (not isinstance(key, tuple) and len(key) > 1 and
-> 1529 not isinstance(key[0], tuple)):
1530 if isinstance(key, ABCSeries):
1531 # GH 14730
/home/pietro/nobackup/repo/pandas/pandas/core/series.py in __getitem__(self, key)
604 key = com._apply_if_callable(key, self)
605 try:
--> 606 result = self.index.get_value(self, key)
607
608 if not is_scalar(result):
/home/pietro/nobackup/repo/pandas/pandas/indexes/base.py in get_value(self, series, key)
2304 try:
2305 return self._engine.get_value(s, k,
-> 2306 tz=getattr(series.dtype, 'tz', None))
2307 except KeyError as e1:
2308 if len(self) > 0 and self.inferred_type in ['integer', 'boolean']:
/home/pietro/nobackup/repo/pandas/pandas/index.pyx in pandas.index.IndexEngine.get_value (pandas/index.c:3992)()
/home/pietro/nobackup/repo/pandas/pandas/index.pyx in pandas.index.IndexEngine.get_value (pandas/index.c:3689)()
/home/pietro/nobackup/repo/pandas/pandas/index.pyx in pandas.index.IndexEngine.get_loc (pandas/index.c:4688)()
/home/pietro/nobackup/repo/pandas/pandas/src/hashtable_class_helper.pxi in pandas.hashtable.Int64HashTable.get_item (pandas/hashtable.c:13370)()
/home/pietro/nobackup/repo/pandas/pandas/src/hashtable_class_helper.pxi in pandas.hashtable.Int64HashTable.get_item (pandas/hashtable.c:13308)()
KeyError: 0Problem description
The index of the indexer should not matter at all... and indeed there is no bug when indexing a (non-Multi)Index:
In [6]: d.set_index(['a']).loc[pd.Series([1, 2], index=[2,3])]
Out[6]:
b c
a
1 1 3
1 2 4
2 2 5
Expected Output
The same as d.set_index(['a', 'b']).loc[pd.Series([1, 2])].
A PR is on its way.
Output of pd.show_versions()
INSTALLED VERSIONS
------------------
commit: None
python: 3.5.2.final.0
python-bits: 64
OS: Linux
OS-release: 4.7.0-1-amd64
machine: x86_64
processor:
byteorder: little
LC_ALL: None
LANG: it_IT.utf8
LOCALE: it_IT.UTF-8
pandas: 0.19.0+464.g0b28e5a
pytest: None
pip: 8.1.2
setuptools: 28.0.0
Cython: 0.23.4
numpy: 1.12.0
scipy: 0.18.1
xarray: None
IPython: 5.1.0.dev
sphinx: 1.4.8
patsy: 0.3.0-dev
dateutil: 2.5.3
pytz: 2015.7
blosc: None
bottleneck: 1.2.0
tables: 3.2.2
numexpr: 2.6.0
feather: None
matplotlib: 2.0.0rc2
openpyxl: None
xlrd: 1.0.0
xlwt: 1.1.2
xlsxwriter: 0.9.3
lxml: None
bs4: 4.5.1
html5lib: 0.999
httplib2: 0.9.1
apiclient: 1.5.2
sqlalchemy: 1.0.15
pymysql: None
psycopg2: None
jinja2: 2.8
s3fs: None
pandas_datareader: 0.2.1