BUG: panda3d/core.cpython-39-darwin.so is not code signed on macOS Big Sur

[HenkPoley]

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• I have confirmed this bug exists on the latest version of pandas.

• (optional) I have confirmed this bug exists on the master branch of pandas.

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Note: Please read this guide detailing how to provide the necessary information for us to reproduce your bug.

Code Sample, a copy-pastable example

On macOS Big Sur 11.2.3 on MacBook Pro M1, with Python 3.9.2, pandas master or v1.2.3 branch:

% python3.9 -c "import panda3d.core"                                              
Traceback (most recent call last):
  File "<string>", line 1, in <module>
ImportError: dlopen(/opt/homebrew/lib/python3.9/site-packages/panda3d/core.cpython-39-darwin.so, 2): no suitable image found.  Did find:
	/opt/homebrew/lib/python3.9/site-packages/panda3d/core.cpython-39-darwin.so: code signature in (/opt/homebrew/lib/python3.9/site-packages/panda3d/core.cpython-39-darwin.so) not valid for use in process using Library Validation: Trying to load an unsigned library

Note below that pandas itself was compiled with a signature.

Problem description

panda3d/core.cpython-39-darwin.so is not code signed on macOS Big Sur

% codesign -v -v /opt/homebrew/lib/python3.9/site-packages/panda3d/core.cpython-39-darwin.so
/opt/homebrew/lib/python3.9/site-packages/panda3d/core.cpython-39-darwin.so: code object is not signed at all
In architecture: arm64

Expected Output

import panda3d.core should load as well.

Output of pd.show_versions()

% python3.9 -c "import pandas; pandas.show_versions()"

INSTALLED VERSIONS

commit : 921477e
python : 3.9.2.final.0
python-bits : 64
OS : Darwin
OS-release : 20.3.0
Version : Darwin Kernel Version 20.3.0: Thu Jan 21 00:06:51 PST 2021; root:xnu-7195.81.3~1/RELEASE_ARM64_T8101
machine : arm64
processor : arm
byteorder : little
LC_ALL : None
LANG : nl_NL.UTF-8
LOCALE : nl_NL.UTF-8

pandas : 1.3.0.dev0+999.g921477ed71
numpy : 1.20.1
pytz : 2021.1
dateutil : 2.8.1
pip : 21.0.1
setuptools : 53.0.0
Cython : 0.29.22
pytest : None
hypothesis : None
sphinx : None
blosc : None
feather : None
xlsxwriter : None
lxml.etree : None
html5lib : None
pymysql : None
psycopg2 : None
jinja2 : 2.11.3
IPython : None
pandas_datareader: None
bs4 : None
bottleneck : None
fsspec : None
fastparquet : None
gcsfs : None
matplotlib : 3.3.4
numexpr : None
odfpy : None
openpyxl : None
pandas_gbq : None
pyarrow : None
pyxlsb : None
s3fs : None
scipy : 1.6.0
sqlalchemy : None
tables : None
tabulate : None
xarray : None
xlrd : None
xlwt : None
numba : None

[HenkPoley]

Oops, wrong project. These are not installed by pandas, but surely: https://github.com/panda3d/panda3d

panda3d/panda3d#1123

Eg: pip3 install https://buildbot.panda3d.org/downloads/576c25b3eab8d3a3501379801fac8c934efe624a/panda3d-1.10.9.dev130-cp39-cp39-macosx_11_0_universal2.whl