Traceback (most recent call last):
  File "/home/russ/Documents/projects/gnss-diff/env_diff/bin/proc_cno", line 33, in <module>
    sys.exit(load_entry_point('gnss-diff', 'console_scripts', 'proc_cno')())
  File "/home/russ/Documents/projects/gnss-diff/env_diff/bin/proc_cno", line 25, in importlib_load_entry_point
    return next(matches).load()
  File "/usr/lib/python3.10/importlib/metadata/__init__.py", line 171, in load
    module = import_module(match.group('module'))
  File "/usr/lib/python3.10/importlib/__init__.py", line 126, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
  File "<frozen importlib._bootstrap>", line 1050, in _gcd_import
  File "<frozen importlib._bootstrap>", line 1027, in _find_and_load
  File "<frozen importlib._bootstrap>", line 1006, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 688, in _load_unlocked
  File "<frozen importlib._bootstrap_external>", line 883, in exec_module
  File "<frozen importlib._bootstrap>", line 241, in _call_with_frames_removed
  File "/home/russ/Documents/projects/gnss-diff/proc_cno.py", line 8, in <module>
    import viewdat_cno_lib as vdl
  File "/home/russ/Documents/projects/gnss-diff/viewdat_cno_lib.py", line 4, in <module>
    import matplotlib.pyplot as plt
  File "/home/russ/Documents/projects/gnss-diff/env_diff/lib/python3.10/site-packages/matplotlib/pyplot.py", line 66, in <module>
    from matplotlib.figure import Figure, FigureBase, figaspect
  File "/home/russ/Documents/projects/gnss-diff/env_diff/lib/python3.10/site-packages/matplotlib/figure.py", line 40, in <module>
    from matplotlib import _blocking_input, backend_bases, _docstring, projections
  File "/home/russ/Documents/projects/gnss-diff/env_diff/lib/python3.10/site-packages/matplotlib/projections/__init__.py", line 57, in <module>
    from .polar import PolarAxes
  File "/home/russ/Documents/projects/gnss-diff/env_diff/lib/python3.10/site-packages/matplotlib/projections/polar.py", line 709, in <module>
    class RadialAxis(maxis.YAxis):
  File "/home/russ/Documents/projects/gnss-diff/env_diff/lib/python3.10/site-packages/matplotlib/artist.py", line 150, in __init_subclass__
    cls._update_set_signature_and_docstring()
  File "/home/russ/Documents/projects/gnss-diff/env_diff/lib/python3.10/site-packages/matplotlib/artist.py", line 178, in _update_set_signature_and_docstring
    + kwdoc(cls))
  File "/home/russ/Documents/projects/gnss-diff/env_diff/lib/python3.10/site-packages/matplotlib/artist.py", line 1853, in kwdoc
    ai = ArtistInspector(artist)
  File "/home/russ/Documents/projects/gnss-diff/env_diff/lib/python3.10/site-packages/matplotlib/artist.py", line 1437, in __init__
    self.aliasd = self.get_aliases()
  File "/home/russ/Documents/projects/gnss-diff/env_diff/lib/python3.10/site-packages/matplotlib/artist.py", line 1455, in get_aliases
    func = getattr(self.o, name)
KeyboardInterrupt