Python cprofiler a function

Question

How to profile one function with cprofiler?

label = process_one(signature)

become

import cProfile

label = cProfile.run(process_one(signature))

but it didn't work :/

I googled your question and found this link that answers it: https://julien.danjou.info/blog/2015/guide-to-python-profiling-cprofile-concrete-case-carbonara — sisanared, Oct 19 '16 at 13:34

score 4 · Accepted Answer · answered Oct 19 '16 at 14:21

You can write some decorator which will be helpful for profiling any function in general with cProfile. This helps me to quickly get stats when I need them.

import cProfile
import pstats
import StringIO
import commands


def qprofile(func):
    def profiled_func(*args, **kwargs):
        if 'profile' in kwargs and kwargs['profile']:
            kwargs.pop('profile')
            profile = cProfile.Profile()
            try:
                profile.enable()
                result = func(*args, **kwargs)
                profile.disable()
                return result
            finally:
                s = StringIO.StringIO()
                ps = pstats.Stats(
                    profile, stream=s).strip_dirs(
                ).sort_stats('cumulative')
                ps.print_stats(30)
                print s.getvalue()
        else:
            result = func(*args, **kwargs)
            return result
    return profiled_func

@qprofile
def process_one(cmd):
    output = commands.getoutput(cmd)
    return output

# Function is profiled if profile=True in kwargs
print(process_one('uname -a', profile=True))

Sample Output:

         7 function calls in 0.013 seconds

   Ordered by: cumulative time

   ncalls  tottime  percall  cumtime  percall filename:lineno(function)
        1    0.000    0.000    0.013    0.013 qprofiler.py:29(process_one)
        1    0.000    0.000    0.013    0.013 commands.py:48(getoutput)
        1    0.000    0.000    0.013    0.013 commands.py:56(getstatusoutput)
        1    0.013    0.013    0.013    0.013 {method 'read' of 'file' objects}
        1    0.000    0.000    0.000    0.000 {posix.popen}
        1    0.000    0.000    0.000    0.000 {method 'close' of 'file' objects}
        1    0.000    0.000    0.000    0.000 {method 'disable' of '_lsprof.Profiler' objects}

Linux chronin 4.4.0-42-generic #62-Ubuntu SMP Fri Oct 7 23:11:45 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux

Please refer official documentation for any call specific references, https://docs.python.org/2/library/profile.html

@Fractale Does this answer helps you ? Can you please mark it appropriate if so? — Sanket Sudake, Nov 17 '16 at 03:13

score 1 · Answer 2 · edited May 23 '17 at 11:48

1

according to documentation (https://docs.python.org/2/library/profile.html) it should be cProfile.run('process_one(signature)')

also, look at the answer https://stackoverflow.com/a/17259420/1966790

edited May 23 '17 at 11:48

Community

1
1

answered Oct 19 '16 at 13:55

MateuszL

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the interpreter say process_one is undefined with that line – Fractale Oct 19 '16 at 14:36

Python cprofiler a function

2 Answers2