matchms.filtering.metadata_processing.add_precursor_mz module

matchms.filtering.metadata_processing.add_precursor_mz.add_precursor_mz(spectrum_in, clone: bool | None = True) → Spectrum | None

Add precursor_mz to correct field and make it a float.

For missing precursor_mz field: check if there is “pepmass”” entry instead. For string parsed as precursor_mz: convert to float.

Parameters:

• spectrum_in – Input spectrum.

• clone – Optionally clone the Spectrum.

Returns:

Spectrum with added precursor mz metadata, or None if not present.

Return type:

Spectrum or None