code: def checkInstalled(versions, optionsRequired=False):
      
      
      if type(versions) == str:
          versions = [versions]
      installed = _find_installed()
      bestMatch = _get_best_match(installed, versions, optionsRequired)
      return bestMatch is not None
docs: Check if there is a version of wxPython installed that matches one
      of the versions given.  Returns True if so, False if not.  This
      can be used to determine if calling `select` will succeed or not.
  
          :param versions: Same as in `select`, either a string or a list
              of strings specifying the version(s) to check for.
  
          :param optionsRequired: Same as in `select`.