Problem installing Python API

User Support
1

I’m experiencing the following issue when attempting to install the Python API for version 0.15.2:

valerio@XPS13:~/Softwares/openmc-0.15.2/openmc$ python3 -m pip install .
Defaulting to user installation because normal site-packages is not writeable
Processing /home/valerio/Softwares/openmc-0.15.2/openmc
Installing build dependencies … done
Getting requirements to build wheel … done
Preparing metadata (pyproject.toml) … done
Building wheels for collected packages: UNKNOWN
Building wheel for UNKNOWN (pyproject.toml) … done
Created wheel for UNKNOWN: filename=UNKNOWN-0.15.2-py3-none-any.whl size=1851 sha256=d021163866c248343b7a451cc1d9a3e8acfa70714e70bd5a971409a5c07afa9c
Stored in directory: /tmp/pip-ephem-wheel-cache-qpsvobjc/wheels/87/3f/96/909665e98ffdf16b434da829873ddf5298ede3c7823af14b21
Successfully built UNKNOWN
Installing collected packages: UNKNOWN
Successfully installed UNKNOWN-0.15.2

I see that the file pyproject.toml reports:

description = “OpenMC”
dynamic = [“version”]
requires-python = “>=3.11”
license = {file = “LICENSE”}
classifiers = [
“Development Status :: 4 - Beta”,
“Intended Audience :: Developers”,
“Intended Audience :: End Users/Desktop”,
“Intended Audience :: Science/Research”,
“License :: OSI Approved :: MIT License”,
“Natural Language :: English”,
“Topic :: Scientific/Engineering”,
“Programming Language :: C++”,
“Programming Language :: Python :: 3”,
“Programming Language :: Python :: 3.11”,
“Programming Language :: Python :: 3.12”,
“Programming Language :: Python :: 3.13”,
]

However, my Python version is 3.10.12. Is that the problem?

2

Yes, you will need to have Python 3.11+ as required by the pyproject.toml file. OpenMC follows these guidelines for support of Python versions.

3

@paulromano, thanks for the information and the link to the guidelines. That’s quite interesting to know.