我有一个Python命令行程序,需要一段时间才能完成。我想知道完成跑步所需的确切时间。

我看过timeit模块,但它似乎只适用于小代码片段。我想给整个节目计时。


当前回答

要使用metakermit对Python 2.7的更新答案,您需要单调包。

代码如下:

from datetime import timedelta
from monotonic import monotonic

start_time = monotonic()
end_time = monotonic()
print(timedelta(seconds=end_time - start_time))

其他回答

首先,以管理员身份打开命令提示符(CMD)并在那里键入,安装人性化的软件包-pip安装人性化

代码:

from humanfriendly import format_timespan
import time
begin_time = time.time()
# Put your code here
end_time = time.time() - begin_time
print("Total execution time: ", format_timespan(end_time))

输出:

我看过timeit模块,但它似乎只适用于小代码片段。我想给整个节目计时。

$ python -mtimeit -n1 -r1 -t -s "from your_module import main" "main()"

它运行一次your_module.main()函数,并使用time.time()函数作为计时器打印经过的时间。

要在Python中模拟/usr/bin/time,请参阅带有/usr/bin/time:如何捕获计时信息但忽略所有其他输出?的Python子进程?。

要测量每个函数的CPU时间(例如,不要包括time.sleep()期间的时间),可以使用profile模块(Python 2上的cProfile):

$ python3 -mprofile your_module.py

如果您想使用与配置文件模块相同的计时器,可以将-p传递给上面的timeit命令。

请参见如何评测Python脚本?

要使用metakermit对Python 2.7的更新答案,您需要单调包。

代码如下:

from datetime import timedelta
from monotonic import monotonic

start_time = monotonic()
end_time = monotonic()
print(timedelta(seconds=end_time - start_time))

在Linux或Unix中:

$ time python yourprogram.py

在Windows中,请参阅StackOverflow问题:如何在Windows命令行上测量命令的执行时间?

对于更详细的输出,

$ time -v python yourprogram.py
    Command being timed: "python3 yourprogram.py"
    User time (seconds): 0.08
    System time (seconds): 0.02
    Percent of CPU this job got: 98%
    Elapsed (wall clock) time (h:mm:ss or m:ss): 0:00.10
    Average shared text size (kbytes): 0
    Average unshared data size (kbytes): 0
    Average stack size (kbytes): 0
    Average total size (kbytes): 0
    Maximum resident set size (kbytes): 9480
    Average resident set size (kbytes): 0
    Major (requiring I/O) page faults: 0
    Minor (reclaiming a frame) page faults: 1114
    Voluntary context switches: 0
    Involuntary context switches: 22
    Swaps: 0
    File system inputs: 0
    File system outputs: 0
    Socket messages sent: 0
    Socket messages received: 0
    Signals delivered: 0
    Page size (bytes): 4096
    Exit status: 0

以下代码段以可读的<HH:MM:SS>格式打印经过的时间。

import time
from datetime import timedelta

start_time = time.time()

#
# Perform lots of computations.
#

elapsed_time_secs = time.time() - start_time

msg = "Execution took: %s secs (Wall clock time)" % timedelta(seconds=round(elapsed_time_secs))

print(msg)