Traceback (most recent call last):
File "tools/demo.py", line 149, in <module>
demo(net, im_name)
File "tools/demo.py", line 98, in demo
vis_detections(im, cls, dets, thresh=CONF_THRESH)
File "tools/demo.py", line 47, in vis_detections
fig, ax = plt.subplots(figsize=(12, 12))
File "/usr/lib/python2.7/dist-packages/matplotlib/pyplot.py", line 1176, in subplots
fig = figure(**fig_kw)
File "/usr/lib/python2.7/dist-packages/matplotlib/pyplot.py", line 539, in figure
**kwargs)
File "/usr/lib/python2.7/dist-packages/matplotlib/backend_bases.py", line 171, in new_figure_manager
return cls.new_figure_manager_given_figure(num, fig)
File "/usr/lib/python2.7/dist-packages/matplotlib/backends/backend_tkagg.py", line 1049, in new_figure_manager_given_figure
window = Tk.Tk(className="matplotlib")
File "/usr/lib/python2.7/lib-tk/Tkinter.py", line 1828, in __init__
self.tk = _tkinter.create(screenName, baseName, className, interactive, wantobjects, useTk, sync, use)
_tkinter.TclError: no display name and no $DISPLAY environment variable