I'm having a problem with the babeltrace (1.4.0-stable) Python 3.5 bindings.
This is similar to Jean Spector's earlier (Sat, 29 Oct 2016 16:55:15 +0300)
problem ("[lttng-dev] Babeltrace python bindings documentation is not
up-to-date") although substantially different.
I earlier had babeltrace used successfully from Python 3 (after a small
binding tweak (bug 1051), albeit with some weird crashes (bugs 1052 and 1054)),
and I'm now trying to run the same script with a refreshed babeltrace build,
without success.
CentOS Linux release 7.1.1503 (Core) 3.10.0-229.4.2.el7.x86_64
babeltrace-stable-1.4-09c9a6e
(LTTng tools is NOT installed)
rh-python35-python-devel (rh-python35-python, -libs, -pip, -setuptools,
rh-python35-runtime) installed
$ python --version
Python 2.7.5
$ python3 --version
Python 3.5.1 :: Anaconda 4.0.0 (64-bit)
If I run the sample code on
http://lttng.org/docs/v2.8/#doc-viewing-and-analyzing-your-traces-bt-python ($
python3 /path/to/top5proc.py /path/to/trace/kernel) I get:
Traceback (most recent call last):
File "/.../top5proc.py", line 70, in <module>
sys.exit(0 if top5proc() else 1)
File "/.../top5proc.py", line 13, in top5proc
col = babeltrace.TraceCollection()
AttributeError: module 'babeltrace' has no attribute 'TraceCollection'
The babeltrace-stable-1.4-09c9a6e package was built and installed successfully
(logs available), though I had to add a symbolic link to PyCharm Community
Edition 2016.1.3 in ~/anaconda3/lib/python3.5/site-packages called babeltrace
and pointing to /usr/local/lib/python3.5/site-packages/babeltrace to get
PyCharm to recognize the package. This is a secondary issue (bug 1076) that
has no bearing since the test described above was entirely conducted from the
command line. Still, PyCharm reports the same error (although with a different
stack) when running similar code.
The bottom line is that Python 3.5 is not recognizing TraceCollection() as a
class constructor.
Since babeltrace 2.0 will keep the same Python bindings (Sat, 29 Oct 2016
17:49:26 -0400, Philippe Proulx: "the Python bindings (this API will remain
maintained)"), waiting for its release is not pertinent.
Daniel U. Thibault, M.Sc.²
Informaticien scientifique, CME-PSC, Centre de recherches de Valcartier
Recherche et développement pour la défense Canada / Gouvernement du Canada
[email protected] / Tél: 418-844-4000x4245 Téléc: 418-844-4538
[email protected] / Tél: 418-844-4000x4245 Téléc: 418-844-4538
Computer Scientist, MCCS-SPC, Valcartier Research Centre
Defence Research and Development Canada / Government of Canada
[email protected] / Tel: 418-844-4000x4245 Fax: 418-844-4538
[email protected] / Tel: 418-844-4000x4245 Fax: 418-844-4538
DRDC is an agency of the Department of National Defence / RDDC est une agence
du ministère de la Défense nationale
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