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BUG: apply contains extra columns after goupby and selected columns
Modin version checks
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[X] I have confirmed this bug exists on the latest released version of Modin.
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Reproducible Example
import modin.pandas as pd
import numpy as np
df = pd.DataFrame(np.random.rand(5, 10), index=[f's{i+1}' for i in range(5)])
selected_cols = df.columns.values
df['new_col'] = 0
def func(df):
assert('new_col' not in df)
return 1
df.groupby('new_col', group_keys=True)[selected_cols].apply(func)
Issue Description
apply
function on selected columns after groupby
do not work in Modin.
Expected Behavior
Vanilla pandas support this feature only selected cols will enter the apply function.
Error Logs
assert('new_col' not in df)
AssertionError
Installed Versions
pd.show_versions()
INSTALLED VERSIONS
commit : b5545c686751f4eed6913f1785f9c68f41f4e51d python : 3.8.10.final.0 python-bits : 64 OS : Linux OS-release : 5.10.16.3-microsoft-standard-WSL2 Version : #1 SMP Fri Apr 2 22:23:49 UTC 2021 machine : x86_64 processor : x86_64 byteorder : little LC_ALL : None LANG : C.UTF-8 LOCALE : en_US.UTF-8
Modin dependencies
modin : 0.23.1 ray : 2.7.0 dask : 2023.5.0 distributed : 2023.5.0 hdk : None
pandas dependencies
pandas : 2.0.3 numpy : 1.24.4 pytz : 2023.3.post1 dateutil : 2.8.2 setuptools : 56.0.0 pip : 23.2.1 Cython : None pytest : 7.4.2 hypothesis : None sphinx : None blosc : None feather : None xlsxwriter : None lxml.etree : None html5lib : 1.1 pymysql : None psycopg2 : None jinja2 : 3.1.2 IPython : None pandas_datareader: None bs4 : 4.12.2 bottleneck : None brotli : None fastparquet : None fsspec : 2023.9.2 gcsfs : None matplotlib : 3.7.3 numba : None numexpr : None odfpy : None openpyxl : None pandas_gbq : None pyarrow : 13.0.0 pyreadstat : None pyxlsb : None s3fs : None scipy : 1.10.1 snappy : None sqlalchemy : None tables : None tabulate : None xarray : None xlrd : None zstandard : None tzdata : 2023.3 qtpy : None pyqt5 : None
THanks for reporting! Confirmed on the latest release
@dchigarev you made some changes that looks pretty close to the problem. Please take a look if you have time.