code: def from_cli(cls, opt):
          
          injection_file = opt.injection_file
          chirp_time_window = \
              opt.injection_filter_rejector_chirp_time_window
          match_threshold = opt.injection_filter_rejector_match_threshold
          coarsematch_deltaf = opt.injection_filter_rejector_coarsematch_deltaf
          coarsematch_fmax = opt.injection_filter_rejector_coarsematch_fmax
          seg_buffer = opt.injection_filter_rejector_seg_buffer
          if opt.injection_filter_rejector_f_lower is not None:
              f_lower = opt.injection_filter_rejector_f_lower
          else:
              # NOTE: Uses main low-frequency cutoff as default option. This may
              #       need some editing if using this in multi_inspiral, which I
              #       leave for future work, or if this is being used in another
              #       code which doesn't have --low-frequency-cutoff
              f_lower = opt.low_frequency_cutoff
          return cls(injection_file, chirp_time_window, match_threshold,
                     f_lower, coarsematch_deltaf=coarsematch_deltaf,
                     coarsematch_fmax=coarsematch_fmax,
                     seg_buffer=seg_buffer)
docs: Create an InjFilterRejector instance from command-line options.