BUG: Reduction operations fail · Issue #41074 · pandas-dev/pandas (original) (raw)

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Code Sample, a copy-pastable example

import pandas pdf = pandas.DataFrame([1, 'a', True])

behavior for pandas 1.2.3

pdf.prod(axis=0, min_count=1, numeric_only=False) 0 a dtype: object

behavior for pandas 1.2.4

pdf.prod(axis=0, min_count=1, numeric_only=False) AssertionError: assert numeric_only is None

behavior for pandas 1.2.3

pdf.sum(axis=0, min_count=1, numeric_only=False) TypeError: unsupported operand type(s) for +: 'int' and 'str'

behavior for pandas 1.2.4

pdf.sum(axis=0, min_count=1, numeric_only=False) AssertionError: assert numeric_only is None

Problem description

Some of the reduction operations (namely, sum and prod) has changed own behavior in 1.2.4 comparing to 1.2.3. prod has become failing and sum has thrown another exception. Other reduction operations need to be checked as well.

Output of pd.show_versions()

pandas : 1.2.4
numpy : 1.19.5
pytz : 2021.1
dateutil : 2.8.1
pip : 20.2.4
setuptools : 50.3.1.post20201107
Cython : None
pytest : 6.2.2
hypothesis : None
sphinx : 3.5.1
blosc : None
feather : 0.4.1
xlsxwriter : None
lxml.etree : 4.6.2
html5lib : None
pymysql : None
psycopg2 : None
jinja2 : 2.11.3
IPython : 7.20.0
pandas_datareader: None
bs4 : 4.9.3
bottleneck : None
fsspec : 0.8.5
fastparquet : None
gcsfs : None
matplotlib : 3.2.2
numexpr : 2.7.2
odfpy : None
openpyxl : 3.0.6
pandas_gbq : 0.14.1
pyarrow : 1.0.0
pyxlsb : None
s3fs : None
scipy : 1.6.0
sqlalchemy : 1.3.23
tables : 3.6.1
tabulate : None
xarray : 0.16.2
xlrd : 2.0.1
xlwt : None
numba : None