Inconsistent behaviour of .ix between list and scalar key with (missing) ints · Issue #20753 · pandas-dev/pandas (original) (raw)
Code Sample, a copy-pastable example if possible
In [2]: pd.Series(range(3)).ix[5] /usr/bin/ipython3:1: DeprecationWarning: .ix is deprecated. Please use .loc for label based indexing or .iloc for positional indexing
See the documentation here: http://pandas.pydata.org/pandas-docs/stable/indexing.html#ix-indexer-is-deprecated #! /bin/sh
KeyError Traceback (most recent call last) /home/nobackup/repo/pandas/pandas/core/indexes/base.py in get_loc(self, key, method, tolerance) 3017 try: -> 3018 return self._engine.get_loc(key) 3019 except KeyError:
/home/nobackup/repo/pandas/pandas/_libs/index.pyx in pandas._libs.index.IndexEngine.get_loc (pandas/_libs/index.c:5729)() 138 --> 139 cpdef get_loc(self, object val): 140 if is_definitely_invalid_key(val):
/home/nobackup/repo/pandas/pandas/_libs/index.pyx in pandas._libs.index.IndexEngine.get_loc (pandas/_libs/index.c:5575)() 160 try: --> 161 return self.mapping.get_item(val) 162 except (TypeError, ValueError):
/home/nobackup/repo/pandas/pandas/_libs/hashtable_class_helper.pxi in pandas._libs.hashtable.Int64HashTable.get_item (pandas/_libs/hashtable.c:15398)() 957 --> 958 cpdef get_item(self, int64_t val): 959 cdef khiter_t k
/home/nobackup/repo/pandas/pandas/_libs/hashtable_class_helper.pxi in pandas._libs.hashtable.Int64HashTable.get_item (pandas/_libs/hashtable.c:15342)() 963 else: --> 964 raise KeyError(val) 965
KeyError: 5
During handling of the above exception, another exception occurred:
KeyError Traceback (most recent call last) /home/nobackup/repo/pandas/pandas/core/indexing.py in _get_label(self, label, axis) 131 try: --> 132 return self.obj._xs(label, axis=axis) 133 except:
/home/nobackup/repo/pandas/pandas/core/generic.py in xs(self, key, axis, level, drop_level) 2991 else: -> 2992 loc = self.index.get_loc(key) 2993
/home/nobackup/repo/pandas/pandas/core/indexes/base.py in get_loc(self, key, method, tolerance) 3019 except KeyError: -> 3020 return self._engine.get_loc(self._maybe_cast_indexer(key)) 3021
/home/nobackup/repo/pandas/pandas/_libs/index.pyx in pandas._libs.index.IndexEngine.get_loc (pandas/_libs/index.c:5729)() 138 --> 139 cpdef get_loc(self, object val): 140 if is_definitely_invalid_key(val):
/home/nobackup/repo/pandas/pandas/_libs/index.pyx in pandas._libs.index.IndexEngine.get_loc (pandas/_libs/index.c:5575)() 160 try: --> 161 return self.mapping.get_item(val) 162 except (TypeError, ValueError):
/home/nobackup/repo/pandas/pandas/_libs/hashtable_class_helper.pxi in pandas._libs.hashtable.Int64HashTable.get_item (pandas/_libs/hashtable.c:15398)() 957 --> 958 cpdef get_item(self, int64_t val): 959 cdef khiter_t k
/home/nobackup/repo/pandas/pandas/_libs/hashtable_class_helper.pxi in pandas._libs.hashtable.Int64HashTable.get_item (pandas/_libs/hashtable.c:15342)() 963 else: --> 964 raise KeyError(val) 965
KeyError: 5
During handling of the above exception, another exception occurred:
KeyError Traceback (most recent call last) in () ----> 1 pd.Series(range(3)).ix[5]
/home/nobackup/repo/pandas/pandas/core/indexing.py in getitem(self, key) 118 119 key = com._apply_if_callable(key, self.obj) --> 120 return self._getitem_axis(key, axis=axis) 121 122 def _get_label(self, label, axis=None):
/home/nobackup/repo/pandas/pandas/core/indexing.py in _getitem_axis(self, key, axis) 1104 return self._get_loc(key, axis=axis) 1105 -> 1106 return self._get_label(key, axis=axis) 1107 1108 def _getitem_iterable(self, key, axis=None):
/home/nobackup/repo/pandas/pandas/core/indexing.py in _get_label(self, label, axis) 132 return self.obj._xs(label, axis=axis) 133 except: --> 134 return self.obj[label] 135 elif isinstance(label, tuple) and isinstance(label[axis], slice): 136 raise IndexingError('no slices here, handle elsewhere')
/home/nobackup/repo/pandas/pandas/core/series.py in getitem(self, key) 753 key = com._apply_if_callable(key, self) 754 try: --> 755 result = self.index.get_value(self, key) 756 757 if not is_scalar(result):
/home/nobackup/repo/pandas/pandas/core/indexes/base.py in get_value(self, series, key) 3051 try: 3052 return self._engine.get_value(s, k, -> 3053 tz=getattr(series.dtype, 'tz', None)) 3054 except KeyError as e1: 3055 if len(self) > 0 and self.inferred_type in ['integer', 'boolean']:
/home/nobackup/repo/pandas/pandas/_libs/index.pyx in pandas._libs.index.IndexEngine.get_value (pandas/_libs/index.c:4856)() 103 return val in self.mapping 104 --> 105 cpdef get_value(self, ndarray arr, object key, object tz=None): 106 """ 107 arr : 1-dimensional ndarray
/home/nobackup/repo/pandas/pandas/_libs/index.pyx in pandas._libs.index.IndexEngine.get_value (pandas/_libs/index.c:4539)() 111 void* data_ptr 112 --> 113 loc = self.get_loc(key) 114 if PySlice_Check(loc) or cnp.PyArray_Check(loc): 115 return arr[loc]
/home/nobackup/repo/pandas/pandas/_libs/index.pyx in pandas._libs.index.IndexEngine.get_loc (pandas/_libs/index.c:5575)() 159 160 try: --> 161 return self.mapping.get_item(val) 162 except (TypeError, ValueError): 163 raise KeyError(val)
/home/nobackup/repo/pandas/pandas/_libs/hashtable_class_helper.pxi in pandas._libs.hashtable.Int64HashTable.get_item (pandas/_libs/hashtable.c:15398)() 956 sizeof(uint32_t)) # flags 957 --> 958 cpdef get_item(self, int64_t val): 959 cdef khiter_t k 960 k = kh_get_int64(self.table, val)
/home/nobackup/repo/pandas/pandas/_libs/hashtable_class_helper.pxi in pandas._libs.hashtable.Int64HashTable.get_item (pandas/_libs/hashtable.c:15342)() 962 return self.table.vals[k] 963 else: --> 964 raise KeyError(val) 965 966 cpdef set_item(self, int64_t key, Py_ssize_t val):
KeyError: 5
In [3]: pd.Series(range(3)).ix[[5]] /usr/bin/ipython3:1: DeprecationWarning: .ix is deprecated. Please use .loc for label based indexing or .iloc for positional indexing
See the documentation here: http://pandas.pydata.org/pandas-docs/stable/indexing.html#ix-indexer-is-deprecated #! /bin/sh Out[3]: 5 NaN dtype: float64
Problem description
Already fixed, opening the issue just for xref from the test/whatsnew.
Expected Output
An error
Output of pd.show_versions()
INSTALLED VERSIONS
commit: d04b746
python: 3.5.3.final.0
python-bits: 64
OS: Linux
OS-release: 4.9.0-6-amd64
machine: x86_64
processor:
byteorder: little
LC_ALL: None
LANG: it_IT.UTF-8
LOCALE: it_IT.UTF-8
pandas: 0.23.0.dev0+754.gd04b7464d
pytest: 3.5.0
pip: 9.0.1
setuptools: 39.0.1
Cython: 0.25.2
numpy: 1.14.1
scipy: 0.19.0
pyarrow: None
xarray: None
IPython: 6.2.1
sphinx: 1.5.6
patsy: 0.5.0
dateutil: 2.7.0
pytz: 2017.2
blosc: None
bottleneck: 1.2.0dev
tables: 3.3.0
numexpr: 2.6.1
feather: 0.3.1
matplotlib: 2.0.0
openpyxl: 2.3.0
xlrd: 1.0.0
xlwt: 1.3.0
xlsxwriter: 0.9.6
lxml: 4.1.1
bs4: 4.5.3
html5lib: 0.999999999
sqlalchemy: 1.0.15
pymysql: None
psycopg2: None
jinja2: 2.10
s3fs: None
fastparquet: None
pandas_gbq: None
pandas_datareader: 0.2.1