code: def test_ioctl_mutate_1024(self):
      # Issue #9758: a mutable buffer of exactly 1024 bytes wouldn't be
      # copied back after the system call.
      self._check_ioctl_mutate_len(1024)
  
file_path: cpython/Lib/test/test_ioctl.py
imports: import array
  import unittest
  from test.support import get_attribute
  from test.support.import_helper import import_module
  import os, struct
label_desc: Use image node_id 4 for calling the IoctlTests obj's underlying member method code with example usage: obj.test_ioctl_mutate_1024() without return types