Risk plot_board() not plotting after I enable X11 window forwarding

[adamzterenyi]

Hey Mike, I'm having an issue with the plot_board() function. I have followed the instructions in your video and logged in with -x to enable X11 forwarding; despite this, I am still running into an issue with the $DISPLAY variable. I even tried to use -y to no desired effect.

Here is my code:

from risk.board import Board,Territory
import copy

# define boards for the tests
# HINT: I recommend you plot these boards
board0 = Board([Territory(territory_id=i, player_id=1, armies=i%5+1) for i in range(42)])

board1 = copy.deepcopy(board0)
board1.set_owner(3,0)
board1.set_armies(3,500)
board1.set_armies(4,500)
board1.set_armies(34,500)
board1.set_armies(39,500)
board1.set_armies(35,500)

board2 = copy.deepcopy(board1)
board2.set_owner(34, 0)
board2.set_armies(34,1)
board2.set_owner(35, 0)
board2.set_armies(35,1)
board2.set_owner(39, 0)
board2.set_armies(39,1)

board3 = copy.deepcopy(board2)
board3.set_owner(34, 1)

board4 = copy.deepcopy(board2)
board4.set_owner(4, 0)
board4.set_armies(4, 1)
board4.set_owner(1, 0)

board5 = Board([Territory(territory_id=i, player_id=i%5, armies=i%5+1) for i in range(42)])

Like pulsar-heart in Issue #525, when I run this file, I receive a similar error code:

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/home/Adam.Terenyi.25/risk/risk/board.py", line 410, in plot_board
    fig, ax = plt.subplots(figsize=(img_width/dpi, 300/dpi), dpi=dpi)
  File "/usr/lib/python3/dist-packages/matplotlib/pyplot.py", line 1176, in subplots
    fig = figure(**fig_kw)
  File "/usr/lib/python3/dist-packages/matplotlib/pyplot.py", line 539, in figure
    **kwargs)
  File "/usr/lib/python3/dist-packages/matplotlib/backend_bases.py", line 171, in new_figure_manager
    return cls.new_figure_manager_given_figure(num, fig)
  File "/usr/lib/python3/dist-packages/matplotlib/backends/backend_tkagg.py", line 1049, in new_figure_manager_given_figure
    window = Tk.Tk(className="matplotlib")
  File "/usr/lib/python3.6/tkinter/__init__.py", line 2023, in __init__
    self.tk = _tkinter.create(screenName, baseName, className, interactive, wantobjects, useTk, sync, use)
_tkinter.TclError: no display name and no $DISPLAY environment variable

I have no idea what to do, as I have tried to fix this using online tutorials and have followed your instructions.

Thank you.

[mikeizbicki]

I believe this was resolved in office hours.