Return result from kill()

[luke-waymark-addinsight]

Is your feature request related to a problem? Please describe.
Using the kill() method has no feedback. The childProcess.kill() method which python-shell uses internally returns a boolean describing the success of the operation, but it's not used. In fact it seems that python-shell assumes it was successfully killed as it sets terminated = true regardless of what happens.

Describe the solution you'd like
Return a boolean for success or failure of killing

[Almenon]

The kill() method() method already has a return value - it returns this allowing you to chain methods.

Although now that I think about it method chaining in this case is not really useful 🤔. If you kill the process you're probably done calling pythonshell methods.

So feel free to submit a PR changing this behavior if you wish and I'll review it.

[luke-waymark-addinsight]

Perhaps rather than setting this.terminated = true blindly, it could instead do this.terminated = this.childProcess.kill(sig), that way you could check the returned object if it successfully terminated and perhaps try again with a more aggressive kill signal.