code: def from_segment_list(cls, description, segmentlist, name, ifo,
                            seg_summ_list=None, **kwargs):
          
          seglistdict = segments.segmentlistdict()
          seglistdict[ifo + ':' + name] = segmentlist
          if seg_summ_list is not None:
              seg_summ_dict = segments.segmentlistdict()
              seg_summ_dict[ifo + ':' + name] = seg_summ_list
          else:
              seg_summ_dict = None
          return cls.from_segment_list_dict(description, seglistdict,
                                            seg_summ_dict=None, **kwargs)
docs: Initialize a SegFile object from a segmentlist.
  
          Parameters
          ------------
          description : string (required)
              See File.__init__
          segmentlist : ligo.segments.segmentslist
              The segment list that will be stored in this file.
          name : str
              The name of the segment lists to be stored in the file.
          ifo : str
              The ifo of the segment lists to be stored in this file.
          seg_summ_list : ligo.segments.segmentslist (OPTIONAL)
              Specify the segment_summary segmentlist that goes along with the
              segmentlist. Default=None, in this case segment_summary is taken
              from the valid_segment of the SegFile class.