请问执行下面的命令如下错误怎么解决呢？
root@f93b51a68ef4:/opt/LCBot# python export_puid.py Getting uuid of QR code. Downloading QR code. Traceback (most recent call last): File "export_puid.py", line 9, in <module> bot = Bot('bot.pkl', console_qr=False) File "/usr/local/lib/python3.6/site-packages/wxpy/api/bot.py", line 74, in __init__ loginCallback=login_callback, exitCallback=logout_callback File "/usr/local/lib/python3.6/site-packages/itchat/components/register.py", line 30, in auto_login loginCallback=loginCallback, exitCallback=exitCallback) File "/usr/local/lib/python3.6/site-packages/itchat/components/login.py", line 44, in login picDir=picDir, qrCallback=qrCallback) File "/usr/local/lib/python3.6/site-packages/itchat/components/login.py", line 117, in get_QR utils.print_qr(picDir) File "/usr/local/lib/python3.6/site-packages/itchat/utils.py", line 83, in print_qr subprocess.call(['xdg-open', fileDir]) File "/usr/local/lib/python3.6/subprocess.py", line 267, in call with Popen(*popenargs, **kwargs) as p: File "/usr/local/lib/python3.6/subprocess.py", line 707, in __init__ restore_signals, start_new_session) File "/usr/local/lib/python3.6/subprocess.py", line 1326, in _execute_child raise child_exception_type(errno_num, err_msg) FileNotFoundError: [Errno 2] No such file or directory: 'xdg-open'