trouble with running the example

[AffDk]

Hi,

I was just trying to play a little with causal graphical models so I started with the provided example.

I ran:

sprinkler = CausalGraphicalModel(
nodes=["season", "rain", "sprinkler", "wet", "slippery"],
edges=[
("season", "rain"),
("season", "sprinkler"),
("rain", "wet"),
("sprinkler", "wet"),
("wet", "slippery")
]
)

draw return a graphviz dot object, which jupyter can render
sprinkler.draw()

and get a long error message:

FileNotFoundError Traceback (most recent call last)
~\AppData\Local\Continuum\anaconda3\lib\site-packages\graphviz\backend.py in run(cmd, input, capture_output, check, encoding, quiet, **kwargs)
163 try:
--> 164 proc = subprocess.Popen(cmd, startupinfo=get_startupinfo(), **kwargs)
165 except OSError as e:

~\AppData\Local\Continuum\anaconda3\lib\subprocess.py in init(self, args, bufsize, executable, stdin, stdout, stderr, preexec_fn, close_fds, shell, cwd, env, universal_newlines, startupinfo, creationflags, restore_signals, start_new_session, pass_fds, encoding, errors, text)
774 errread, errwrite,
--> 775 restore_signals, start_new_session)
776 except:

~\AppData\Local\Continuum\anaconda3\lib\subprocess.py in _execute_child(self, args, executable, preexec_fn, close_fds, pass_fds, cwd, env, startupinfo, creationflags, shell, p2cread, p2cwrite, c2pread, c2pwrite, errread, errwrite, unused_restore_signals, unused_start_new_session)
1177 os.fspath(cwd) if cwd is not None else None,
-> 1178 startupinfo)
1179 finally:

FileNotFoundError: [WinError 2] The system cannot find the file specified

During handling of the above exception, another exception occurred:

ExecutableNotFound Traceback (most recent call last)
~\AppData\Local\Continuum\anaconda3\lib\site-packages\IPython\core\formatters.py in call(self, obj)
343 method = get_real_method(obj, self.print_method)
344 if method is not None:
--> 345 return method()
346 return None
347 else:

~\AppData\Local\Continuum\anaconda3\lib\site-packages\graphviz\files.py in repr_svg(self)
111
112 def repr_svg(self):
--> 113 return self.pipe(format='svg').decode(self._encoding)
114
115 def pipe(self, format=None, renderer=None, formatter=None, quiet=False):

~\AppData\Local\Continuum\anaconda3\lib\site-packages\graphviz\files.py in pipe(self, format, renderer, formatter, quiet)
136 out = backend.pipe(self._engine, format, data,
137 renderer=renderer, formatter=formatter,
--> 138 quiet=quiet)
139
140 return out

~\AppData\Local\Continuum\anaconda3\lib\site-packages\graphviz\backend.py in pipe(engine, format, data, renderer, formatter, quiet)
242 """
243 cmd, _ = command(engine, format, None, renderer, formatter)
--> 244 out, _ = run(cmd, input=data, capture_output=True, check=True, quiet=quiet)
245 return out
246

~\AppData\Local\Continuum\anaconda3\lib\site-packages\graphviz\backend.py in run(cmd, input, capture_output, check, encoding, quiet, **kwargs)
165 except OSError as e:
166 if e.errno == errno.ENOENT:
--> 167 raise ExecutableNotFound(cmd)
168 else:
169 raise

ExecutableNotFound: failed to execute ['dot', '-Tsvg'], make sure the Graphviz executables are on your systems' PATH

I restarted the kernel a few times and even the computer. Also as suggested in the error message, I added Graphviz to system path but it did not change anything.

Any hint on how I can resolve the issue?
Best regards

[AffDk]

I finally installed Graphviz separately and this resolved the issue.
I am using windows 10 and apparently Graphviz has some issues on windows:

dask/dask-tutorial#86