[Python] How to properly set-up GraphViz for Mac or Windows?

[jordan-carson]

Hello, Polars,

I have asked this question on SO.

Trying to set-up graphviz for df.show_graph() however after adding graphviz and matplotlib locations to my path env var, I receive the follow error.

Traceback (most recent call last):
  File "/Users/jordancarson/Projects/JHU/pract.py", line 24, in <module>
    print(res.show_graph(optimized=True))
  File "/Users/jordancarson/Projects/JHU/.venv/lib/python3.9/site-packages/polars/internals/lazy_frame.py", line 464, in show_graph
    subprocess.run(["dot", "-Nshape=box", "-Tpng", "-O", dot_path])
  File "/opt/homebrew/Cellar/[email protected]/3.9.13_1/Frameworks/Python.framework/Versions/3.9/lib/python3.9/subprocess.py", line 505, in run
    with Popen(*popenargs, **kwargs) as process:
  File "/opt/homebrew/Cellar/[email protected]/3.9.13_1/Frameworks/Python.framework/Versions/3.9/lib/python3.9/subprocess.py", line 951, in __init__
    self._execute_child(args, executable, preexec_fn, close_fds,
  File "/opt/homebrew/Cellar/[email protected]/3.9.13_1/Frameworks/Python.framework/Versions/3.9/lib/python3.9/subprocess.py", line 1821, in _execute_child
    raise child_exception_type(errno_num, err_msg, err_filename)
FileNotFoundError: [Errno 2] No such file or directory: 'dot'

Getting closer, but still no cigar (🚬...).

Any advice or thoughts on how to get this to work? I have tried using Issue GraphViz.

[jordan-carson]

I have followed this post https://stackoverflow.com/questions/43372723/how-to-open-dot-on-mac - which mentions to use MacPorts to install graphviz via sudo apt install.... The problem here is it installs on a different version of python that I do not use.

[ritchie46]

The conda package installer can often help a lot with this.

[slonik-az]

If you on Mac M1 try out mamba (faster drop-in conda replacement). Install Graphviz with

mamba install graphviz

and you well get dot and friends installed.