Unable to kill command

[ccjernigan]

STEPS TO REPRODUCE

1. Run the command python3 checkmate.py mainnet.lightwalletd.com:9067 --start-height 1460000 --to-json
2. After the execution starts, press control-C to terminate (use case would be realizing that the URL or start-height parameters are wrong

RESULTS

Actual

Fails to terminate

Expected

Terminates command immediately, like other command line tools.

WORKAROUND

Kill the terminal window