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","."]
code: def __init__(self, virtualenv_path):
      self._virtualenv_path = virtualenv_path
      self._is_activated = False
  
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 1 to create a new VirtualEnvHandler object from inherited base classes: object with example: obj = VirtualEnvHandler(virtualenv_path)