Is pyautogui work in the ubuntu 18.04 server version with no display accessed via ssh?

Question

When I am import pyautogui it gives me:

Traceback (most recent call last):
  File "app.py", line 2, in <module>
    from register import reg
  File "/home/nlp/Projects/face_recognition/register.py", line 12, in <module>
    import pyautogui
  File "/home/nlp/miniconda3/envs/face_recognition_env/lib/python3.6/site-packages/pyautogui/__init__.py", line 241, in <module>
    import mouseinfo
  File "/home/nlp/miniconda3/envs/face_recognition_env/lib/python3.6/site-packages/mouseinfo/__init__.py", line 223, in <module>
    _display = Display(os.environ['DISPLAY'])
  File "/home/nlp/miniconda3/envs/face_recognition_env/lib/python3.6/site-packages/Xlib/display.py", line 80, in __init__
    self.display = _BaseDisplay(display)
  File "/home/nlp/miniconda3/envs/face_recognition_env/lib/python3.6/site-packages/Xlib/display.py", line 62, in __init__
    display.Display.__init__(*(self, ) + args, **keys)
  File "/home/nlp/miniconda3/envs/face_recognition_env/lib/python3.6/site-packages/Xlib/protocol/display.py", line 58, in __init__
    self.socket = connect.get_socket(name, host, displayno)
  File "/home/nlp/miniconda3/envs/face_recognition_env/lib/python3.6/site-packages/Xlib/support/connect.py", line 76, in get_socket
    return mod.get_socket(dname, host, dno)
  File "/home/nlp/miniconda3/envs/face_recognition_env/lib/python3.6/site-packages/Xlib/support/unix_connect.py", line 78, in get_socket
    raise error.DisplayConnectionError(dname, str(val))
Xlib.error.DisplayConnectionError: Can't connect to display ":0": [Errno 2] No such file or directory

I have tried this:

import os
os.environ['DISPLAY'] = ':0'

But still same error. According to one comment of to this link (https://github.com/asweigart/pyautogui/issues/161) in github says it is not accessible remotely. I have tried sudo xhost + command but it gives me below error.

xhost:  unable to open display ""