code: def _print_str(self, expr):
      return repr(expr)
  
imports: from __future__ import annotations
  from typing import Any
  from sympy.core.function import AppliedUndef
  from sympy.core.mul import Mul
  from mpmath.libmp import repr_dps, to_str
  from .printer import Printer, print_function
label_desc: Use image node_id 41 for calling the ReprPrinter obj's underlying member method code with example usage: obj._print_str(expr) and returns: repr