即使在导入后，模块 whois 也无法在 Python 3 中工作

Question

请检查我在安装和导入 whois 模块后得到的以下输出有人可以帮助解决这个问题吗？Python 3.6.7 (default, Oct 22 2018, 11:32:17) [GCC 8.2.0] on linuxType "help", "copyright", "credits" or "license" for more information.>>> import whois>>> domain = whois.query('www.google.com')Traceback (most recent call last):  File "<stdin>", line 1, in <module>  File "/usr/local/lib/python3.6/dist-packages/whois/__init__.py", line 50, in query    pd = do_parse(do_query(d, force, cache_file, slow_down, ignore_returncode), tld)  File "/usr/local/lib/python3.6/dist-packages/whois/_1_query.py", line 44, in do_query    _do_whois_query(dl, ignore_returncode),  File "/usr/local/lib/python3.6/dist-packages/whois/_1_query.py", line 58, in _do_whois_query    p = subprocess.Popen(['whois', '.'.join(dl)], stdout=subprocess.PIPE, stderr=subprocess.STDOUT)  File "/usr/lib/python3.6/subprocess.py", line 709, in __init__    restore_signals, start_new_session)  File "/usr/lib/python3.6/subprocess.py", line 1344, in _execute_child    raise child_exception_type(errno_num, err_msg, err_filename)FileNotFoundError: [Errno 2] No such file or directory: 'whois': 'whois'`