# Source code for simple_parser

    #!/usr/bin/env python
    import sys
    import pymzml

    def main(mzml_file):
        """
        Basic example script to demonstrate the usage of pymzML. Requires a mzML
        file as first argument.

        usage:

            ./simple_parser.py <path_to_mzml_file>

        Note:

            This script uses the new syntax with the MS level being a property of
            the spectrum class ( Spectrum.ms_level ). The old syntax can be found in
            the script simple_parser_v2.py where the MS level can be queried as a key
            (Spectrum['ms level'])

        """
        run = pymzml.run.Reader(mzml_file)
        for n, spec in enumerate(run):
            print(
                "Spectrum {0}, MS level {ms_level} @ RT {scan_time:1.2f}".format(
                    spec.ID, ms_level=spec.ms_level, scan_time=spec.scan_time_in_minutes()
                )
            )
        print("Parsed {0} spectra from file {1}".format(n, mzml_file))
        print()

    if __name__ == "__main__":
        if len(sys.argv) < 2:
            print(main.__doc__)
            exit()
        mzml_file = sys.argv[1]
        main(mzml_file)