class_docstr: This class exists to allow virtual environment creation to be
  customized. The constructor parameters determine the builder's
  behaviour when called upon to create a virtual environment.
  
  By default, the builder makes the system (global) site-packages dir
  *un*available to the created environment.
  
  If invoked using the Python -m option, the default is to use copying
  on Windows platforms but symlinks elsewhere. If instantiated some
  other way, the default is to *not* use symlinks.
  
  :param system_site_packages: If True, the system (global) site-packages
                               dir is available to created environments.
  :param clear: If True, delete the contents of the environment directory if
                it already exists, before environment creation.
  :param symlinks: If True, attempt to symlink rather than copy files into
                   virtual environment.
  :param upgrade: If True, upgrade an existing virtual environment.
  :param with_pip: If True, ensure pip is installed in the virtual
                   environment
  :param prompt: Alternative terminal prefix for the environment.
  :param upgrade_deps: Update the base venv modules to the latest on PyPI
  :param scm_ignore_files: Create ignore files for the SCMs specified by the
                           iterable.
code: def clear_directory(self, path):
      for fn in os.listdir(path):
          fn = os.path.join(path, fn)
          if os.path.islink(fn) or os.path.isfile(fn):
              os.remove(fn)
          elif os.path.isdir(fn):
              shutil.rmtree(fn)
  
imports: import logging
  import os
  import shutil
  import subprocess
  import sys
  import sysconfig
  import types
label_desc: Use image node_id 3 for calling the EnvBuilder obj's underlying member method code with example usage: obj.clear_directory(path) without return types