FAQ

FAQ#

How do I change the default log file?#

Call util.start_logging(filename).

from pysme import util
util.start_logging("your_log_file.log")

Get output of A module that was compiled using NumPy 1.x cannot be run in NumPy 2.2.0 as it may crash.#

This is an ABI mismatch between your NumPy and the installed _smelib binary.

  • For <= v0.6.26, PySME may attempt a runtime rebuild/download path.

  • For >= v0.6.27, the recommended fix is to reinstall PySME in the target environment so binaries are rebuilt/reinstalled consistently.

If you see output like:

running build_ext
building '_smelib' extension

the extension is being rebuilt.

I get an error “Derivatives in the starting point are not finite”#

Make sure your initial stellar parameters are within the atmosphere grid defined by the atmosphere file set in sme.atmo.source

I get an error “lnGAS: DGESVX failed to solved for corrections the partial pressures.”#

The most possible reason would be the abvundance of the element in error is too low or nan, thus the EOS code cannot compute its EOS.

I upgraded PySME, but behavior/version output still looks old#

This is usually caused by a stale compiled extension (_smelib) left in the environment. Python may load the stale binary instead of the expected one from the current wheel.

First, check what is actually loaded:

python - <<'PY'
import pysme
from pysme.smelib import _smelib
print("PySME:", pysme.__version__)
print("PySME file:", pysme.__file__)
print("_smelib file:", _smelib.__file__)
PY

If _smelib points to an unexpected legacy file, do a clean reinstall in the same environment:

python -m pip uninstall -y pysme-astro
python - <<'PY'
import site, shutil
from pathlib import Path
for sp in site.getsitepackages():
    p = Path(sp)
    shutil.rmtree(p / "pysme", ignore_errors=True)
    for di in p.glob("pysme_astro-*.dist-info"):
        shutil.rmtree(di, ignore_errors=True)
print("cleaned")
PY
python -m pip install --no-cache-dir pysme-astro==X.Y.Z  # example version

Replace X.Y.Z with the target release version you want to test.

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