docs: def get_alt(self, individual=0, nucleotides_only=True):
          """Returns the alternative alleles of the individual as a list"""
          #not i.startswith(',') is put in to handle cases like <DEL:ME:ALU> where we have no alternate allele
          #but some reference
          if isinstance(individual, str):
              individual = self.individuals[individual]
          if nucleotides_only:
              return [self.alt[i-1].replace('.', '') for i in self.genotype[individual] if i > 0 and not self.alt[i-1].startswith('<')]
          else:
              return [self.alt[i-1].replace('.', '') for i in self.genotype[individual] if i > 0]