python执行shell命令时报错： -/bin/sh: 命令:not found的解决办法

     file='test.txt'

     cmd = f'rsync -av  {file} root@10.18.6.46:/home/cjw/'



      p = subprocess.Popen(cmd, shell=True, stdout=subprocess.PIPE, stderr=subprocess.PIPE,executable="/bin/bash")

      output, error = p.communicate()

      if p.returncode != 0:

          print("Error while running - %s" % cmd)

          print(error)

      print(output)