class_docstr: Creates and manages a virtualenv for benchmarking, which allows for
  clean dependency management and benchmarking of multiple versions without
  contaminating the system's `site-packages` folder.
class_docstr_tok: ["Creates","and","manages","a","virtualenv","for","benchmarking",",","which","allows","for","clean","dependency","management","and","benchmarking","of","multiple","versions","without","contaminating","the","system","'s","`","site-packages","`","folder","."]
docstr: Returns whether the directory specified by `VIRTUALENV_PATH`
  exists.
docstr_tok: ["Returns","whether","the","directory","specified","by","`","VIRTUALENV_PATH","`","exists","."]
code: def virtualenv_exists(self):
      """Returns whether the directory specified by `VIRTUALENV_PATH`
      exists."""
      return os.path.exists(self._virtualenv_path)
  
imports: import logging
  import os
  import sys
  import signal
  import subprocess
  import venv
  import tornado
  from timeit import timeit
  from perspective import Table, PerspectiveManager, PerspectiveTornadoHandler
label_desc: Use image node_id 2 for calling the VirtualEnvHandler obj's underlying member method code with example usage: obj.virtualenv_exists() and returns: os