class_docstr: A printer to convert expressions to strings of Octave/Matlab code.
class_docstr_tok: ["A","printer","to","convert","expressions","to","strings","of","Octave\/Matlab","code","."]
code: def _print_yn(self, expr):
      from sympy.functions import sqrt, bessely
  
      x = expr.argument
      expr2 = sqrt(S.Pi / (2 * x)) * bessely(expr.order + S.Half, x)
      return self._print(expr2)
  
imports: from __future__ import annotations
  from typing import Any
  from sympy.core import Mul, Pow, S, Rational
  from sympy.core.mul import _keep_coeff
  from sympy.core.numbers import equal_valued
  from sympy.printing.codeprinter import CodePrinter
  from sympy.printing.precedence import precedence, PRECEDENCE
  from re import search
label_desc: Use image node_id 42 for calling the OctaveCodePrinter obj's underlying member method code with example usage: obj._print_yn(expr) and returns: self