时间：

import time
time.time()
time.clock()

多行连接：

1. ()
2. \

计时器：

import time
import threading
import os


def foo():
    print time.time()
    threading.Timer(1, foo).start()


if __name__ == "__main__":
    start_time = time.clock()
    foo()
    while 1:
        if time.clock()-start_time > 10:
            os._exit(0)

时间漂零

1509090489.31
1509090490.32
1509090491.33
1509090492.34
1509090493.35
1509090494.35
1509090495.37
1509090496.37
1509090497.38
1509090498.4
1509090499.41