How can I exclude certain module paths from deoplete-jedi?

My workstation includes thousands of Python files via a network drive. How can I prevent deoplete-jedi from crawling the path where the network drive is mounted to avoid slowing down the whole system? I had the same problem with the ALE syntax highlighter, which I solved by setting an option `let g:ale_pattern_options = {'/path/to/exclude/.*': {'ale_enabled': 0}}`.

Start by tracing how deoplete-jedi discovers Python modules and compare its configuration needs with the reported ALE pattern option. Done means users can exclude a mounted path from module crawling without system-wide slowdown, with the behavior verified against a representative excluded path.

Written by the indexing model from the issue text.