如果您想以微秒为单位测量时间，那么可以使用以下版本，完全基于Paul McGuire和Nicojo的答案——这是Python 3代码。我还为它添加了一些颜色：

import atexit
from time import time
from datetime import timedelta, datetime


def seconds_to_str(elapsed=None):
    if elapsed is None:
        return datetime.now().strftime("%Y-%m-%d %H:%M:%S.%f")
    else:
        return str(timedelta(seconds=elapsed))


def log(txt, elapsed=None):
    colour_cyan = '\033[36m'
    colour_reset = '\033[0;0;39m'
    colour_red = '\033[31m'
    print('\n ' + colour_cyan + '  [TIMING]> [' + seconds_to_str() + '] ----> ' + txt + '\n' + colour_reset)
    if elapsed:
        print("\n " + colour_red + " [TIMING]> Elapsed time ==> " + elapsed + "\n" + colour_reset)


def end_log():
    end = time()
    elapsed = end-start
    log("End Program", seconds_to_str(elapsed))


start = time()
atexit.register(end_log)
log("Start Program")

log（）=>打印定时信息的函数。

txt==>要记录的第一个参数及其用于标记计时的字符串。

atexit==>Python模块，用于注册程序退出时可以调用的函数。

我在很多地方都遇到了同样的问题，所以我创建了一个方便的套装占星术。你可以用pip安装钟表，然后以优雅的方式安装：

from horology import Timing

with Timing(name='Important calculations: '):
    prepare()
    do_your_stuff()
    finish_sth()

将输出：

Important calculations: 12.43 ms

或者更简单（如果你有一个功能）：

from horology import timed

@timed
def main():
    ...

将输出：

main: 7.12 h

它负责单位和舍入。它适用于python 3.6或更高版本。

这是获取程序运行时间的最简单方法：

在程序末尾编写以下代码。

import time
print(time.clock())

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)    

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