BUG: DataFrame.from_records()'s columns argument doesn't work on Numpy's structured array · Issue #59717 · pandas-dev/pandas (original) (raw)

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Reproducible Example

import pandas as pd import numpy as np

data = np.array([ ('John', 25, 'New York', 50000), ('Jane', 30, 'San Francisco', 75000), ('Bob', 35, 'Chicago', 65000), ('Alice', 28, 'Los Angeles', 60000) ], dtype=[('name', 'U10'), ('age', 'i4'), ('city', 'U15'), ('salary', 'i4')])

df = pd.DataFrame.from_records(data, columns=['salary', 'city', 'age', 'name'])

print(df)

Issue Description

The columns parameter doesn't appear to reorder the columns when the input data is a structured array, even though the documentation says it should. (It does do this for other data types.) In addition, the argument doesn't filter the columns like it does for other input types like dict (a behavior which isn't documented yet, but which will be -- see #59670).

Expected Behavior

According to the discussion in #15319 and #59670, DataFrame.from_records()'s columns argument should allow the users to reorder columns (and include only specific columns) from the Numpy's structured array the way it works for data passed as a dictionary.

Installed Versions

INSTALLED VERSIONS

commit : a671b5a
python : 3.10.12.final.0
python-bits : 64
OS : Linux
OS-release : 6.1.85+
Version : #1 SMP PREEMPT_DYNAMIC Thu Jun 27 21:05:47 UTC 2024
machine : x86_64
processor : x86_64
byteorder : little
LC_ALL : en_US.UTF-8
LANG : en_US.UTF-8
LOCALE : en_US.UTF-8

pandas : 2.1.4
numpy : 1.26.4
pytz : 2024.1
dateutil : 2.8.2
setuptools : 71.0.4
pip : 24.1.2
Cython : 3.0.11
pytest : 7.4.4
hypothesis : None
sphinx : 5.0.2
blosc : None
feather : None
xlsxwriter : None
lxml.etree : 4.9.4
html5lib : 1.1
pymysql : None
psycopg2 : 2.9.9
jinja2 : 3.1.4
IPython : 7.34.0
pandas_datareader : 0.10.0
bs4 : 4.12.3
bottleneck : None
dataframe-api-compat: None
fastparquet : None
fsspec : 2024.6.1
gcsfs : 2024.6.1
matplotlib : 3.7.1
numba : 0.60.0
numexpr : 2.10.1
odfpy : None
openpyxl : 3.1.5
pandas_gbq : 0.23.1
pyarrow : 14.0.2
pyreadstat : None
pyxlsb : None
s3fs : None
scipy : 1.13.1
sqlalchemy : 2.0.32
tables : 3.8.0
tabulate : 0.9.0
xarray : 2024.6.0
xlrd : 2.0.1
zstandard : None
tzdata : 2024.1
qtpy : None
pyqt5 : None