code: def scaled_zero(
      mag: tUnion[SCALED_ZERO_TUP, int], sign=1
  ) -> tUnion[MPF_TUP, tTuple[SCALED_ZERO_TUP, int]]:
      """Return an mpf representing a power of two with magnitude ``mag``
      and -1 for precision. Or, if ``mag`` is a scaled_zero tuple, then just
      remove the sign from within the list that it was initially wrapped
      in.
  
      Examples
      ========
  
      >>> from sympy.core.evalf import scaled_zero
      >>> from sympy import Float
      >>> z, p = scaled_zero(100)
      >>> z, p
      (([0], 1, 100, 1), -1)
      >>> ok = scaled_zero(z)
      >>> ok
      (0, 1, 100, 1)
      >>> Float(ok)
      1.26765060022823e+30
      >>> Float(ok, p)
      0.e+30
      >>> ok, p = scaled_zero(100, -1)
      >>> Float(scaled_zero(ok), p)
      -0.e+30
      """
      if (
          isinstance(mag, tuple)
          and len(mag) == 4
          and iszero(mag, scaled=True)
      ):
          return (mag[0][0],) + mag[1:]
      elif isinstance(mag, SYMPY_INTS):
          if sign not in [-1, 1]:
              raise ValueError("sign must be +/-1")
          rv, p = mpf_shift(fone, mag), -1
          s = 0 if sign == 1 else 1
          rv = ([s],) + rv[1:]
          return rv, p
      else:
          raise ValueError(
              "scaled zero expects int or scaled_zero tuple."
          )
  
imports: from __future__ import annotations
  from typing import Tuple, Optional, Union, Callable, List, Dict, Type, TYPE_CHECKING, Any, overload
  import math
  import mpmath.libmp
  from mpmath import make_mpc, make_mpf, mp, mpc, mpf, nsum, quadts, quadosc, workprec
  from mpmath import inf
  from mpmath.libmp import from_int, from_man_exp, from_rational, fhalf, fnan, finf, fninf, fnone, fone, fzero, mpf_abs, mpf_add, mpf_atan, mpf_atan2, mpf_cmp, mpf_cos, mpf_e, mpf_exp, mpf_log, mpf_lt, mpf_mul, mpf_neg, mpf_pi, mpf_pow, mpf_pow_int, mpf_shift, mpf_sin, mpf_sqrt, normalize, round_nearest, to_int, to_str
  from mpmath.libmp import bitcount
  from mpmath.libmp.backend import MPZ
  from mpmath.libmp.libmpc import _infs_nan
  from mpmath.libmp.libmpf import dps_to_prec, prec_to_dps
  from .sympify import sympify
  from .singleton import S
  from sympy.external.gmpy import SYMPY_INTS
  from sympy.utilities.iterables import is_sequence
  from sympy.utilities.lambdify import lambdify
  from sympy.utilities.misc import as_int
label_desc: Use image node_id 6 for calling a global function with example usage: scaled_zero(mag, sign) and returns: unknown, rv,  p