Wrong orientation of operations between DataFrame and range() · Issue #17901 · pandas-dev/pandas (original) (raw)

Code Sample, a copy-pastable example if possible

In [3]: df = pd.DataFrame(np.ones((2,2)), columns=['A', 'B'])

In [4]: df + list(range(2)) Out[4]: A B 0 1.0 2.0 1 1.0 2.0

In [5]: df + pd.Series(range(2), index=df.columns) Out[5]: A B 0 1.0 2.0 1 1.0 2.0

In [6]: df + range(2) Out[6]: A B 0 1.0 1.0 1 2.0 2.0

Problem description

Operations where the operand is a range operate in the wrong direction compared to all other 1-d objects (I can think of).

Expected Output

Same as In [4]: and In [5]:.

Output of pd.show_versions()

INSTALLED VERSIONS

commit: 8a69543
python: 3.5.3.final.0
python-bits: 64
OS: Linux
OS-release: 4.9.0-3-amd64
machine: x86_64
processor:
byteorder: little
LC_ALL: None
LANG: it_IT.UTF-8
LOCALE: it_IT.UTF-8

pandas: 0.21.0rc1+19.g8a69543ab.dirty
pytest: 3.0.6
pip: 9.0.1
setuptools: None
Cython: 0.25.2
numpy: 1.12.1
scipy: 0.19.0
pyarrow: None
xarray: None
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: 2.0.0
openpyxl: None
xlrd: 1.0.0
xlwt: 1.1.2
xlsxwriter: 0.9.6
lxml: None
bs4: 4.5.3
html5lib: 0.999999999
sqlalchemy: 1.0.15
pymysql: None
psycopg2: None
jinja2: 2.9.6
s3fs: None
fastparquet: None
pandas_gbq: None
pandas_datareader: 0.2.1