def parse_ped(ped_stream, family_type='ped'):
    """Parse out minimal family information from a PED file.

    Args:
        ped_stream(iterable(str))
        family_type(str): Format of the pedigree information

    Returns:
        family_id(str), samples(list[dict])
    """
    pedigree = FamilyParser(ped_stream, family_type=family_type)

    if len(pedigree.families) != 1:
        raise PedigreeError("Only one case per ped file is allowed")

    family_id = list(pedigree.families.keys())[0]
    family = pedigree.families[family_id]

    samples = [{
        'sample_id': ind_id,
        'father': individual.father,
        'mother': individual.mother,
        # Convert sex to human readable
        'sex': SEX_MAP[individual.sex],
        'phenotype': PHENOTYPE_MAP[int(individual.phenotype)],
    } for ind_id, individual in family.individuals.items()]

    return family_id, samples