def f(self):
        if self.raiseOnEvent == 'exception':
            x = 0
            y = 1/x
        else:
            return 1
Request a subsystem and return a deferred reply.
dataset/ETHPy150Open amrdraz/kodr/app/brython/www/src/Lib/test/test_sys_settrace.py/RaisingTraceFuncTestCase.f--crossover with--dataset/ETHPy150Open sporsh/carnifex/carnifex/ssh/session.py/SSHSession.requestSubsystem