class_docstr: This class represents a process running in a pseudoterminal.
  
  The main constructor is the :meth:`spawn` classmethod.
docstr: This returns the file descriptor of the pty for the child.
          
docstr_tok: ["This","returns","the","file","descriptor","of","the","pty","for","the","child","."]
code: def fileno(self):
      """This returns the file descriptor of the pty for the child."""
      return self.fd
  
imports: import codecs
  import errno
  import fcntl
  import io
  import os
  import pty
  import resource
  import signal
  import struct
  import sys
  import termios
  import time
  from pty import STDIN_FILENO, CHILD
  from .util import which, PtyProcessError
label_desc: Use image node_id 7 for calling the PtyProcess obj's underlying member method code with example usage: obj.fileno() and returns: self