class_docstr: A class for arbitrary expressions. 
class_docstr_tok: ["A","class","for","arbitrary","expressions","."]
docstr: Convert SymPy's expression to ``dtype``. 
docstr_tok: ["Convert","SymPy","'s","expression","to","``","dtype","``","."]
code: def from_sympy(self, a):
      """Convert SymPy's expression to ``dtype``."""
      return self.dtype(a)
  
imports: from sympy.core import sympify, SympifyError
  from sympy.polys.domains.domainelement import DomainElement
  from sympy.polys.domains.characteristiczero import CharacteristicZero
  from sympy.polys.domains.field import Field
  from sympy.polys.domains.simpledomain import SimpleDomain
  from sympy.polys.polyutils import PicklableWithSlots
  from sympy.utilities import public
label_desc: Use image node_id 5 for calling the ExpressionDomain obj's underlying member method code with example usage: obj.from_sympy(a) and returns: self