我使用来自ttictoc的tic和toc。

pip install ttictoc

然后可以在脚本中使用：

from ttictoc import tic,toc
tic()

# foo()

print(toc())

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)    

我定义了以下Python装饰器：

def profile(fct):
  def wrapper(*args, **kw):
    start_time = time.time()
    ret = fct(*args, **kw)
    print("{} {} {} return {} in {} seconds".format(args[0].__class__.__name__,
                                                    args[0].__class__.__module__,
                                                    fct.__name__,
                                                    ret,
                                                    time.time() - start_time))
    return ret
  return wrapper

并将其用于函数或类/方法：

@profile
def main()
   ...

time.clock（）

自3.3版起已弃用：此函数的行为取决于在平台上：改用perf_counter（）或process_time（），这取决于您的需求，以具有定义良好的行为。

time.perf_counter（）

返回性能计数器的值（以秒为单位），即具有最高可用分辨率的时钟来测量短路期间它包括睡眠期间的时间系统范围内。

time.process_time（）

返回系统和当前进程的用户CPU时间。它不包括经过的时间在睡眠期间。

start = time.process_time()
... do something
elapsed = (time.process_time() - start)

我也喜欢Paul McGuire的回答，并提出了一个更符合我需求的上下文管理器表单。

import datetime as dt
import timeit

class TimingManager(object):
    """Context Manager used with the statement 'with' to time some execution.

    Example:

    with TimingManager() as t:
       # Code to time
    """

    clock = timeit.default_timer

    def __enter__(self):
        """
        """
        self.start = self.clock()
        self.log('\n=> Start Timing: {}')

        return self

    def __exit__(self, exc_type, exc_val, exc_tb):
        """
        """
        self.endlog()

        return False

    def log(self, s, elapsed=None):
        """Log current time and elapsed time if present.
        :param s: Text to display, use '{}' to format the text with
            the current time.
        :param elapsed: Elapsed time to display. Dafault: None, no display.
        """
        print s.format(self._secondsToStr(self.clock()))

        if(elapsed is not None):
            print 'Elapsed time: {}\n'.format(elapsed)

    def endlog(self):
        """Log time for the end of execution with elapsed time.
        """
        self.log('=> End Timing: {}', self.now())

    def now(self):
        """Return current elapsed time as hh:mm:ss string.
        :return: String.
        """
        return str(dt.timedelta(seconds = self.clock() - self.start))

    def _secondsToStr(self, sec):
        """Convert timestamp to h:mm:ss string.
        :param sec: Timestamp.
        """
        return str(dt.datetime.fromtimestamp(sec))

只需使用timeit模块。它同时适用于Python 2和Python 3。

import timeit

start = timeit.default_timer()

# All the program statements
stop = timeit.default_timer()
execution_time = stop - start

print("Program Executed in "+str(execution_time)) # It returns time in seconds

它在几秒钟内返回，您可以获得执行时间。这很简单，但您应该在启动程序执行的主函数中编写这些。如果您想获得执行时间，即使在出现错误时，也可以将参数“Start”设置为它，并在那里进行如下计算：

def sample_function(start,**kwargs):
     try:
         # Your statements
     except:
         # except statements run when your statements raise an exception
         stop = timeit.default_timer()
         execution_time = stop - start
         print("Program executed in " + str(execution_time))