class_docstr: A class for representing rational function fields. 
class_docstr_tok: ["A","class","for","representing","rational","function","fields","."]
docstr: Make a new fraction field with given domain. 
docstr_tok: ["Make","a","new","fraction","field","with","given","domain","."]
code: def set_domain(self, dom):
      """Make a new fraction field with given domain."""
      return self.__class__(dom, *self.gens)
  
imports: from sympy.polys.domains.field import Field
  from sympy.polys.domains.compositedomain import CompositeDomain
  from sympy.polys.polyclasses import DMF
  from sympy.polys.polyerrors import GeneratorsNeeded
  from sympy.polys.polyutils import dict_from_basic, basic_from_dict, _dict_reorder
  from sympy.utilities import public
label_desc: Use image node_id 2 for calling the FractionField obj's underlying member method code with example usage: obj.set_domain(dom) and returns: self