code: def getdefaultencoding(prefer_stream=True):
      """Return IPython's guess for the default encoding for bytes as text.
  
      If prefer_stream is True (default), asks for stdin.encoding first,
      to match the calling Terminal, but that is often None for subprocesses.
  
      Then fall back on locale.getpreferredencoding(),
      which should be a sensible platform default (that respects LANG environment),
      and finally to sys.getdefaultencoding() which is the most conservative option,
      and usually UTF8 as of Python 3.
      """
      enc = None
      if prefer_stream:
          enc = get_stream_enc(sys.stdin)
      if not enc or enc == "ascii":
          try:
              # There are reports of getpreferredencoding raising errors
              # in some cases, which may well be fixed, but let's be conservative here.
              enc = locale.getpreferredencoding()
          except Exception:
              pass
      enc = enc or sys.getdefaultencoding()
      # On windows `cp0` can be returned to indicate that there is no code page.
      # Since cp0 is an invalid encoding return instead cp1252 which is the
      # Western European default.
      if enc == "cp0":
          warnings.warn(
              "Invalid code page cp0 detected - using cp1252 instead."
              "If cp1252 is incorrect please ensure a valid code page "
              "is defined for the process.",
              RuntimeWarning,
          )
          return "cp1252"
      return enc
  
imports: import sys
  import locale
  import warnings
label_desc: Use image node_id 2 for calling a global function with example usage: getdefaultencoding(prefer_stream) and returns: enc, str