Python/bcc program only exits after i hold Ctrl+C (instead of just pressing)

Question

As the title suggests I have this python/bcc program that doesn't stop when pressing KeyboardInterrupt, i have to hold it. The code is as follows:

def callback(ctx, data, size):
    event = bpf["syscalls"].event(data)
    if syscall_name(event.syscall_id).decode('utf-8') not in filter_syscalls and event.comm.decode('utf-8') not in filter_comms and event.pid not in filter_pid:
        print(event.pid)
        print(filter_pid)

bpf = BPF(text=text)
bpf["syscalls"].open_ring_buffer(callback)

while 1:
    try:
        bpf.ring_buffer_poll()
    except KeyboardInterrupt:
        sys.exit()

EDIT: I added a time.sleep(0.5) to the try block and it now stops when I press ctrl+c, might be losing events though.