code: def dupfile(f, mode=None, buffering=0, raising=False, encoding=None):
      """return a new open file object that's a duplicate of f
  
      mode is duplicated if not given, 'buffering' controls
      buffer size (defaulting to no buffering) and 'raising'
      defines whether an exception is raised when an incompatible
      file object is passed in (if raising is False, the file
      object itself will be returned)
      """
      try:
          fd = f.fileno()
          mode = mode or f.mode
      except AttributeError:
          if raising:
              raise
          return f
      newfd = os.dup(fd)
      if sys.version_info >= (3, 0):
          if encoding is not None:
              mode = mode.replace("b", "")
              buffering = True
          return os.fdopen(
              newfd, mode, buffering, encoding, closefd=True
          )
      else:
          f = os.fdopen(newfd, mode, buffering)
          if encoding is not None:
              return EncodedFile(f, encoding)
          return f
  
imports: import os
  import sys
  import py
  import tempfile
label_desc: Use image node_id 1 for calling a global function with example usage: dupfile(f, mode, buffering, raising, encoding) and returns: os, f, f, EncodedFile