Source code for matchms.filtering.require_precursor_mz

import logging
from typing import Union
from ..typing import SpectrumType

logger = logging.getLogger("matchms")

[docs]def require_precursor_mz(spectrum_in: SpectrumType, minimum_accepted_mz: float = 10.0 ) -> Union[SpectrumType, None]: """Returns None if there is no precursor_mz or if <= minimum_accepted_mz Parameters ---------- spectrum_in: Input spectrum. minimum_accepted_mz: Set to minimum acceptable value for precursor m/z. Default is set to 10.0. """ if spectrum_in is None: return None spectrum = spectrum_in.clone() precursor_mz = spectrum.get("precursor_mz", None) if precursor_mz is None: pepmass = spectrum.get("pepmass", None) assert pepmass is None or not isinstance(pepmass[0], (float, int)), \ "Found 'pepmass' but no 'precursor_mz'. " \ "Consider applying 'add_precursor_mz' filter first." return None assert isinstance(precursor_mz, (float, int)), \ ("Expected 'precursor_mz' to be a scalar number.", "Consider applying 'add_precursor_mz' filter first.") if precursor_mz <= minimum_accepted_mz:"Spectrum without precursor_mz was set to None.") return None return spectrum