docs: def _call_conda(self, extra_args, abspath=True, parse=False,
                      callback=None):
          """
          Call conda with the list of extra arguments, and return the worker.
  
          The result can be force by calling worker.communicate(), which returns
          the tuple (stdout, stderr).
          """
          if abspath:
              if sys.platform == 'win32':
                  python = join(self.ROOT_PREFIX, 'python.exe')
                  conda = join(self.ROOT_PREFIX, 'Scripts',
                               'conda-script.py')
              else:
                  python = join(self.ROOT_PREFIX, 'bin/python')
                  conda = join(self.ROOT_PREFIX, 'bin/conda')
              cmd_list = [python, conda]
          else:
              # Just use whatever conda is on the path
              cmd_list = ['conda']
  
          cmd_list.extend(extra_args)
  
          process_worker = ProcessWorker(cmd_list, parse=parse,
                                         callback=callback)
          process_worker.sig_finished.connect(self._start)
          self._queue.append(process_worker)
          self._start()
  
          return process_worker