`pydot` error for Windows pip install: `dot` executable not in path

[CBroz1]

Bug Report

Description

This pydot issue summarizes the issues for Windows users. For DataJoint Windows users, pip install datajoint may result in the following errors when calling dj.Diagram:

FileNotFoundError: [WinError 2] "dot" not found in path.

Reproducibility

Include:

• OS WIN
• Python 3.8
• DataJoint 0.13.5
• Minimum number of steps to reliably reproduce the issue

pip install datajoint
from any_pipeline import table
import datajoint as dj
dj.Di(table)

Expected Behavior

When installing datajoint according to instructions, Diagram should work across all platforms.

Possible solves:

1. Permit pydot's optional prog argument (see source) across all write_X functions when calling dj.Diagram(table, prog='dot.exe')
2. Catch this FileNotFoundError and do one or more of the following
   1. Attempt prog arg ourselves.
   2. Direct users to pydot discussion
   3. Suggest conda install of pydot