code: def _init_pval_name(**kws):
          
          if 'pval_name' in kws:
              return kws['pval_name']
          if 'goea_results' in kws:
              goea = kws['goea_results']
              if goea:
                  return "p_{M}".format(M=goea[0].method_flds[0].fieldname)
docs: Initialize pvalue attribute name.