pass encoding parameter to read_text on setup.py?

[WolfgangKurz]

Describe the bug
Cannot install via pip, seems python detecting wrong encoding when read README file.

Trying build from cloned code returns same error.

To Reproduce
Try to install or build at CJK encoding system? (at least my case)

command was:

pip install numpy-quaternion

or

git clone https://github.com/moble/quaternion.git
cd quaternion
python setup.py bdist_wheel

Expected behavior
A clear and concise description of what you expected to happen and why.

Environment (please complete the following information):

• Windows 11 24H2 (26100.2894), python 3.13.1, CP949 encoding environment
• install from pip, compile from source
• Numpy version : 2.2.2 (latest) when trying, 2.1.3 after build succeeded
• Quaternion version : latest (2024.0.3)

Additional context
i modified setup.py like:

line 15

long_description = (this_directory / "README.md").read_text("utf-8")

and build succeeded.

[moble]

Sorry about that, and thanks for finding the solution. I've added your modification to setup.py.