code: def _read(fd):
      """Default read function."""
      return os.read(fd, 1024)
  
file_path: catboost/contrib/tools/python3/src/Lib/pty.py
imports: from select import select
  import os
  import sys
  import tty
  from os import close, waitpid
  from tty import setraw, tcgetattr, tcsetattr
label_desc: Use image node_id 6 for calling a global function with example usage: _read(fd) and returns: os