Confused with version resolution rule

[madjxatw]

I am using python 3.11 on my machine and I have the following constraints in pyproject.toml:

dependencies = [
    "numpy>=1.18.5"
]
require-python = ">3.7"

pdm install finally picks numpy 1.21.1 zip file and compiles the source. So

• Why does it choose a source package but not a pre-built wheel?
• In order to support python 3.7, why does it pick 1.21.1 over 1.21.6. Version 1.21.6 is the latest one that supports py37, shouldn't it choose the latest workable one?

Another similar example:

dependencies = [
    "pandas>=1.1.4"
]
require-python = ">3.7"

pdm install picks pandas.1.1.5.tar.gz and compiles the source. Why doesn't it choose pandas 1.2.0 which also supports python 3.7 ~ 3.9.

[pawamoy]

• Your project supports Python 3.11
• Numpy 1.21.6 does not support Python 3.11: https://github.com/numpy/numpy/blob/v1.21.6/setup.py#L409
• I suspect Numpy 1.21.2 through 1.21.5 do not support Python 3.11 either
• Numpy 1.21.1 supports Python 3.11: https://github.com/numpy/numpy/blob/v1.21.1/setup.py#L408
• Therefore PDM selects the latest version that supports Python 3.11, which is 1.21.1
• There are no prebuilt wheel for Numpy 1.21.1 and Python 3.11, so PDM builds from sources

Similar flow for Pandas I guess 🙂

[madjxatw]

Thanks for the patient answer! I didn't check the setup.py file but just referenced the info provided on PyPI page where it tells that Numpy 1.21.1 supports up to Python 3.9.