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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def _do_prioritize(items):
 """Determine if we should perform prioritization. Currently done on tumor-only input samples and feeding into PureCN which needs the germline annotations. """

    if not any("tumoronly-prioritization" in dd.get_tools_off(d) for d in items):
        if vcfutils.get_paired_phenotype(items[0]):
            has_tumor = False
            has_normal = False
            for sub_data in items:
                if vcfutils.get_paired_phenotype(sub_data) == "tumor":
                    has_tumor = True
                elif vcfutils.get_paired_phenotype(sub_data) == "normal":
                    has_normal = True
            return has_tumor and not has_normal