code: def mpf_shift(s, n):
      """Quickly multiply the raw mpf s by 2**n without rounding."""
      sign, man, exp, bc = s
      if not man:
          return s
      return sign, man, exp + n, bc
  
imports: import math
  from bisect import bisect
  import sys
  from .backend import MPZ, MPZ_TYPE, MPZ_ZERO, MPZ_ONE, MPZ_TWO, MPZ_FIVE, BACKEND, STRICT, HASH_MODULUS, HASH_BITS, gmpy, sage, sage_utils
  from .libintmath import giant_steps, trailtable, bctable, lshift, rshift, bitcount, trailing, sqrt_fixed, numeral, isqrt, isqrt_fast, sqrtrem, bin_to_radix
label_desc: Use image node_id 46 for calling a global function with example usage: mpf_shift(s, n) and returns: sign,  man,  unknown,  bc, s