def create(): return e1.pipe( ops.with_latest_from(e2), ops.map(sum), )
def create(): return e1.pipe( ops.with_latest_from(e2), ops.map(lambda xy: _raise(ex)), )
def create(): return e1.pipe( ops.with_latest_from(e2), ops.map(sum), )
def create(): return e1.pipe( ops.with_latest_from(e2), ops.map(lambda xy: _raise(ex)), )