dmypy: run multiple independent daemons

[Jasha10]

While editing python files, I use two tools that both rely on dmypy as a backend.
Sometimes one tool causes the other tool to malfunction via dmypy interaction.

For example, tool 1 works well on its own, but once I start tool 2, tool 1's call to dmypy results in a "configuration changed" message and a "No data received" error with exit code 2:

Restarting: configuration changed
Daemon stopped
Daemon started
No data received

Feature

I would like each tool to use it's own instance of dmypy. Tool 2 should not interfere with tool 1.
Perhaps this could be configured via a command-line flag for the dmypy executable.

[pranavrajpal]

I believe this should already be supported by the --status-file flag. Both tools would have to create their own names for the status file in a way that wouldn't result in conflicts so that both don't end up trying to use .dmypy.json as the status file.

[Jasha10]

Awesome... Thanks very much!!