Exception ignored in atexit callback: <function Halo.__init__.<locals>.clean_up at 0x77e901426700>
Traceback (most recent call last):
File "/builddir/python-halo-0.0.31/halo/halo.py", line 104, in clean_up
self.stop()
File "/builddir/python-halo-0.0.31/halo/halo.py", line 515, in stop
self.clear()
File "/builddir/python-halo-0.0.31/halo/halo_notebook.py", line 51, in clear
with self.output:
^^^^^^^^^^^
AttributeError: 'HaloNotebook' object has no attribute 'output'
