pytest-profiling not generating SVG file

[williamjamir]

OS version: Windows 10
Python Version: 3.6.5
pytest version: 3.7.3
pytest-profiling version: 1.3.0

Executing pytest --profile works fine for me, but when I use the pytest --profile-svg I have the following output

(py36) λ pytest --profile-svg
=== test session starts ===============================
platform win32 -- Python 3.6.5, pytest-3.7.3, py-1.5.3, pluggy-0.7.1
PyQt5 5.6 -- Qt runtime 5.6.2 -- Qt compiled 5.6.2
rootdir: W:\tmp2\profiling_test, inifile:
plugins: xdist-1.23.0, timeout-1.3.2, replay-0.2.2, regressions-1.0.1, qt-2.4.1, profiling-1.3.0, mock-1.10.0, localserver-0.4.1, lazy-fixture-0.3.0, forked-0.2, datadir-1.2.1, cpp-1.1.0, cov-2.5.1, pylama-7.4.3, hypothesis-3.11.0
collected 1 item

test_foo.py .                                                                                                    [100%]The syntax of the command is incorrect.

Profiling (from W:\tmp2\profiling_test\prof\combined.prof):
Wed Sep  5 11:09:28 2018    W:\tmp2\profiling_test\prof\combined.prof

         199 function calls (197 primitive calls) in 0.004 seconds

   Ordered by: cumulative time
   List reduced from 92 to 20 due to restriction <20>

   ncalls  tottime  percall  cumtime  percall filename:lineno(function)
        1    0.000    0.000    0.003    0.003 runner.py:107(pytest_runtest_call)
        1    0.000    0.000    0.003    0.003 python.py:1448(runtest)
        1    0.000    0.000    0.003    0.003 hooks.py:244(__call__)
        1    0.000    0.000    0.003    0.003 manager.py:64(_hookexec)
        1    0.000    0.000    0.003    0.003 manager.py:58(<lambda>)
        1    0.000    0.000    0.003    0.003 callers.py:151(_multicall)
        1    0.000    0.000    0.003    0.003 python.py:186(pytest_pyfunc_call)
        1    0.000    0.000    0.003    0.003 test_foo.py:1(testFoo)
        1    0.003    0.003    0.003    0.003 test_foo.py:2(<listcomp>)
      7/5    0.000    0.000    0.000    0.000 {built-in method builtins.next}
        2    0.000    0.000    0.000    0.000 capture.py:206(pytest_runtest_call)
        5    0.000    0.000    0.000    0.000 {method 'send' of 'generator' objects}
        2    0.000    0.000    0.000    0.000 capture.py:164(item_capture)
        1    0.000    0.000    0.000    0.000 contextlib.py:85(__exit__)
        1    0.000    0.000    0.000    0.000 capture.py:121(read_global_capture)
        1    0.000    0.000    0.000    0.000 capture.py:482(readouterr)
        2    0.000    0.000    0.000    0.000 capture.py:578(snap)
        2    0.000    0.000    0.000    0.000 capture.py:539(snap)
        2    0.000    0.000    0.000    0.000 {method 'read' of '_io.FileIO' objects}
        1    0.000    0.000    0.000    0.000 runner.py:129(_update_current_test_var)


SVG profile in W:\tmp2\profiling_test\prof\combined.svg.

And the combined.svg file is not generated.

[smarie]

I have exactly the same issue "The syntax of the command is incorrect." on Windows 7 with graphviz properly installed (since the commandlines below work).

Here is the workaround that I currently use.

I assume that you have installed graphviz and added its bin folder to the path (a simple way is to use conda install graphviz if you use anaconda or miniconda).

gprof2dot -f pstats prof/combined.prof > prof/tmp
dot -Tsvg -o prof/combined.svg prof/tmp

That generates the svg file.

It would however be great if this could be done automatically, I'll have a look and propose a PR

[smarie]

Diagnosis attempt: current version uses pipes.Template to perform the transform.

This ends up building the following command:

"IN='C:\\...\\tests\\servicetests\\prof\\combined.prof'; gprof2dot -f pstats $IN |\n{ OUT='C:\\...\\tests\\servicetests\\prof\\combined.svg'; dot -Tsvg -o $OUT; }"

This is therefore not valid on windows targets.

Suggested remedy: use subprocess.Popen instead .

[isaacnorman82]

I still see this issue, did the fix make it into 1.7.0?

[smarie]

I don't think so, see #162

[rpbc86]

I have exactly the same issue "The syntax of the command is incorrect." on Windows 7 with graphviz properly installed (since the commandlines below work).

Here is the workaround that I currently use.

I assume that you have installed graphviz and added its bin folder to the path (a simple way is to use conda install graphviz if you use anaconda or miniconda).

gprof2dot -f pstats prof/combined.prof > prof/tmp
dot -Tsvg -o prof/combined.svg prof/tmp

That generates the svg file.

It would however be great if this could be done automatically, I'll have a look and propose a PR

solution worked
thanks for inputs :)