nzmath.poly.formalsum

DictFormalSum

A formal sum implementation based on dict.

This class inherits FormalSumContainerInterface.

constoructor

DictFormalSum(args [,defaultvalue])

args can be any dict initial values. It makes a mapping from bases to coefficients.

The optional argument defaultvalue is the default value for __getitem__, i.e., if there is no term with the specified base, a look up attempt returns the defaultvalue.