Problem in keyboard input using python pyUserInput module

[kunal mehindru]

i am working on a project which aim to generate keyboard input in python .I am working on beaglebone black(angstrom) plugged to my laptop using usb.I installed python 2.7 & xlib for it & pUserInput python module but on compilation i am getting error

File "project.py", line 2, in <module>
k=PyKeyboard()
File "/usr/lib/python2.7/site-packages/pykeyboard/x11.py", line 75, in __init__
self.display = Display(display)
File "/usr/lib/python2.7/site-packages/Xlib/display.py", line 83, in __init__
self.display = _BaseDisplay(display)
File "/usr/lib/python2.7/site-packages/Xlib/display.py", line 65, in __init__
apply(protocol.display.Display.__init__, (self, ) + args, keys)
File "/usr/lib/python2.7/site-packages/Xlib/protocol/display.py", line 44, in __init__
name, host, displayno, screenno = connect.get_display(display)
File "/usr/lib/python2.7/site-packages/Xlib/support/connect.py", line 65, in get_display
return mod.get_display(display)
File "/usr/lib/python2.7/site-packages/Xlib/support/unix_connect.py", line 59, in get_display
raise error.DisplayNameError(display)
Xlib.error.DisplayNameError: Bad display name ""

I am attaching the screenshot of error
Help sir .. i think problem is in display detection .. or is it that i need to use different display & keyboard for my beaglebone and not my laptop ?