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In [2]: pd.DataFrame([[1,2], [3,4], [5,6]], index=['a','a','b']).drop(['a']) Out[2]: 0 1 b 5 6 In [3]: pd.DataFrame([[1,2], [3,4], [5,6]], index=['a','a','b']).drop(['b']) Out[3]: 0 1 a 1 2 a 3 4 In [4]: pd.DataFrame([[1,2], [3,4], [5,6]], index=['a','a','b']).drop([]) --------------------------------------------------------------------------- ValueError Traceback (most recent call last) <ipython-input-4-ae217de2434b> in <module>() ----> 1 pd.DataFrame([[1,2], [3,4], [5,6]], index=['a','a','b']).drop([]) /home/pietro/.local/lib/python3.5/site-packages/pandas/core/generic.py in drop(self, labels, axis, level, inplace, errors) 2063 indexer = ~axis.get_level_values(level).isin(labels) 2064 else: -> 2065 indexer = ~axis.isin(labels) 2066 2067 slicer = [slice(None)] * self.ndim /home/pietro/.local/lib/python3.5/site-packages/pandas/core/indexes/base.py in isin(self, values, level) 2766 if level is not None: 2767 self._validate_index_level(level) -> 2768 return algos.isin(np.array(self), values) 2769 2770 def _can_reindex(self, indexer): /home/pietro/.local/lib/python3.5/site-packages/pandas/core/algorithms.py in isin(comps, values) 419 comps = comps.astype(object) 420 --> 421 return f(comps, values) 422 423 /home/pietro/.local/lib/python3.5/site-packages/pandas/core/algorithms.py in <lambda>(x, y) 397 # work-around for numpy < 1.8 and comparisions on py3 398 # faster for larger cases to use np.in1d --> 399 f = lambda x, y: htable.ismember_object(x, values) 400 if (_np_version_under1p8 and compat.PY3) or len(comps) > 1000000: 401 f = lambda x, y: np.in1d(x, y) /home/pietro/nobackup/repo/pandas/pandas/_libs/hashtable_func_helper.pxi in pandas._libs.hashtable.ismember_object (pandas/_libs/hashtable.c:29677)() ValueError: Buffer dtype mismatch, expected 'Python object' but got 'double'
Notice pd.DataFrame([[1,2], [3,4], [5,6]], index=['a','b', 'c']).drop([]) works just fine.
pd.DataFrame([[1,2], [3,4], [5,6]], index=['a','b', 'c']).drop([])
Just the original DataFrame.
DataFrame
pd.show_versions()
commit: None python: 3.5.3.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: 0.20.1 pytest: 3.0.6 pip: 9.0.1 setuptools: None Cython: 0.25.2 numpy: 1.12.1 scipy: 0.19.0 xarray: 0.9.2 IPython: 5.1.0.dev sphinx: 1.5.6 patsy: 0.4.1 dateutil: 2.6.0 pytz: 2017.2 blosc: None bottleneck: 1.2.1 tables: 3.3.0 numexpr: 2.6.1 feather: 0.3.1 matplotlib: 2.0.2 openpyxl: 2.3.0 xlrd: 1.0.0 xlwt: 1.1.2 xlsxwriter: 0.9.6 lxml: 3.7.1 bs4: 4.5.3 html5lib: 0.999999999 sqlalchemy: 1.0.15 pymysql: None psycopg2: None jinja2: 2.9.6 s3fs: None pandas_gbq: None pandas_datareader: 0.2.1
The text was updated successfully, but these errors were encountered:
Working on this as a part of the pycon sprint
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Code Sample, a copy-pastable example if possible
Problem description
Notice
pd.DataFrame([[1,2], [3,4], [5,6]], index=['a','b', 'c']).drop([])
works just fine.Expected Output
Just the original
DataFrame
.Output of
pd.show_versions()
INSTALLED VERSIONS
commit: None
python: 3.5.3.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: 0.20.1
pytest: 3.0.6
pip: 9.0.1
setuptools: None
Cython: 0.25.2
numpy: 1.12.1
scipy: 0.19.0
xarray: 0.9.2
IPython: 5.1.0.dev
sphinx: 1.5.6
patsy: 0.4.1
dateutil: 2.6.0
pytz: 2017.2
blosc: None
bottleneck: 1.2.1
tables: 3.3.0
numexpr: 2.6.1
feather: 0.3.1
matplotlib: 2.0.2
openpyxl: 2.3.0
xlrd: 1.0.0
xlwt: 1.1.2
xlsxwriter: 0.9.6
lxml: 3.7.1
bs4: 4.5.3
html5lib: 0.999999999
sqlalchemy: 1.0.15
pymysql: None
psycopg2: None
jinja2: 2.9.6
s3fs: None
pandas_gbq: None
pandas_datareader: 0.2.1
The text was updated successfully, but these errors were encountered: