code: def touch(self, directory, filename):
      fullname = os.path.join(directory, filename)
      open(fullname, "wb").close()
  
imports: import contextlib
  import os
  import os.path
  import sys
  import tempfile
  import test.support
  import unittest
  import unittest.mock
  import ensurepip
  import ensurepip._uninstall
label_desc: Use image node_id 1 for calling the TestPackages obj's underlying member method code with example usage: obj.touch(directory, filename) without return types