code: def diff_bytes(
      dfunc,
      a,
      b,
      fromfile=b"",
      tofile=b"",
      fromfiledate=b"",
      tofiledate=b"",
      n=3,
      lineterm=b"\n",
  ):
      r"""
      Compare `a` and `b`, two sequences of lines represented as bytes rather
      than str. This is a wrapper for `dfunc`, which is typically either
      unified_diff() or context_diff(). Inputs are losslessly converted to
      strings so that `dfunc` only has to worry about strings, and encoded
      back to bytes on return. This is necessary to compare files with
      unknown or inconsistent encoding. All other inputs (except `n`) must be
      bytes rather than str.
      """
  
      def decode(s):
          try:
              return s.decode("ascii", "surrogateescape")
          except AttributeError as err:
              msg = "all arguments must be bytes, not %s (%r)" % (
                  type(s).__name__,
                  s,
              )
              raise TypeError(msg) from err
  
      a = list(map(decode, a))
      b = list(map(decode, b))
      fromfile = decode(fromfile)
      tofile = decode(tofile)
      fromfiledate = decode(fromfiledate)
      tofiledate = decode(tofiledate)
      lineterm = decode(lineterm)
  
      lines = dfunc(
          a, b, fromfile, tofile, fromfiledate, tofiledate, n, lineterm
      )
      for line in lines:
          yield line.encode("ascii", "surrogateescape")
  
imports: from heapq import nlargest
  from collections import namedtuple
  from types import GenericAlias
  import re
label_desc: Use image node_id 11 for calling a global function with example usage: diff_bytes(dfunc, a, b, fromfile, tofile, fromfiledate, tofiledate, n, lineterm) and returns: s