(self, allele)
return self
To add more alleles using the += operator

         .. versionadded:: 0.6
            The __iadd__ method.
To add more alleles using the += operator
To add more alleles using the + = operator
def __iadd__(self, allele):
      """ To add more alleles using the += operator

         .. versionadded:: 0.6
            The __iadd__ method.
      """
      self.add(allele)
      return self
def __iadd__ ( self , allele ) : self . add ( allele ) return self