哎，真是的，这么简单的问题有什么好讨论的

def group_by_second(logs):
start = null
window = defaultdict(int)
for time, ip in logs:
if time - start > 1000:
yield window
start = null
window = {}
if start is null:
start = time
window[ip] += 1

windows = []
ip_cnt = defaultdict(int)
for window in group_by_second(logs):
windows.append(window)
if len(windows) > 60:
for ip, cnt in windows.pop(0):
ip_cnt[ip] -= cnt
for ip, cnt in window:
ip_cnt[ip] += cnt
if ip_cnt[ip] > 100:
print ip