class_docstr: Class containing information about nuclear family relatedness and sex.
  
  :param str s: Sample ID of proband.
  
  :param fam_id: Family ID.
  :type fam_id: str or None
  
  :param pat_id: Sample ID of father.
  :type pat_id: str or None
  
  :param mat_id: Sample ID of mother.
  :type mat_id: str or None
  
  :param is_female: Sex of proband.
  :type is_female: bool or None
code: def __str__(self):
      return (
          "Trio(s=%s, fam_id=%s, pat_id=%s, mat_id=%s, is_female=%s)"
          % (
              str(self.s),
              str(self.fam_id),
              str(self.pat_id),
              str(self.mat_id),
              str(self.is_female),
          )
      )
  
imports: import re
  from collections import Counter
  from hail.typecheck import typecheck_method, nullable, sequenceof
  from hail.utils.java import Env, FatalError, warning
label_desc: Use image node_id 3 for calling the Trio obj's underlying member method code with example usage: obj.__str__() and returns: unknown