class_docstr: Domain that has infinite number of elements. 
class_docstr_tok: ["Domain","that","has","infinite","number","of","elements","."]
docstr: Return the characteristic of this domain. 
docstr_tok: ["Return","the","characteristic","of","this","domain","."]
code: def characteristic(self):
      """Return the characteristic of this domain."""
      return 0
  
imports: from sympy.polys.domains.domain import Domain
  from sympy.utilities import public
label_desc: Use image node_id 1 for calling the CharacteristicZero obj's underlying member method code with example usage: obj.characteristic() and returns: int