close() hanging if a Ctrl+C presseed ie. KeyboardInterrupt was raised

[raczben]

The Instrument.close() method hanging (or throws a timeout exception) if ctrl+c was pressed during a read operation.
Some instrument commands consume time (eg.: saving/fetching screenshot of the oscilloscope). If I press Ctrl+C during an ask() or read(), the close()method cannot finish properly: it throws timeout error after the timeout time has been elapsed, which timeout must be big in some cases (because of the time consuming commands.)

[mileslucas]

I was thinking about making a pull request that incorporates a context manager for the Device class such that I could use

with Instrument(myip) as inst:
    inst.ask(‘*IDN?’)l

The implementation wouldn’t be hard but I’m not sure if that would actually fix this problem.