code: def copyfileobj(fsrc, fdst, length=0):
      """copy data from file-like object fsrc to file-like object fdst"""
      if not length:
          length = COPY_BUFSIZE
      # Localize variable access to minimize overhead.
      fsrc_read = fsrc.read
      fdst_write = fdst.write
      while buf := fsrc_read(length):
          fdst_write(buf)
  
imports: import os
  import sys
  import stat
  import fnmatch
  import collections
  import errno
label_desc: Use image node_id 4 for calling a global function with example usage: copyfileobj(fsrc, fdst, length) without return types