[Rivet] Using zipped I/O

[Andy Buckley]

Hmm, I'm seeing the same problem now. This is *very* strange -- it was
definitely working at the end of last year, and the equivalent code in
Rivet is still 100% working for reading zipped HepMC files. Looking into
it, but with limited time: it'd be good to get multiple eyes on this, if
possible.

Andy


On 23 April 2018 at 14:58, Corpe, Louie <l.corpe at ucl.ac.uk> wrote:

> Hi Andy,
>
> thanks for the suggestion.
> It doesn't seem there is anything bad related to gzip or lib in the YODA
> config.log...
> (Everything looks like this [1] which looks largely fine).
> There are some other errors regarding a compiler being c++11 or not, but I
> can't tell if this was problematic, given that everything appears to have
> compiled ok in the end.
> I've put the config.log here in case you checked : /afs/
> cern.ch/user/l/lcorpe/public/RivetZippedIO/config.log
>
> Still, maybe I went wrong in the installation.. I am on lxplus7, and
> followed the /2.6.0/rivet-bootstrap-lcg workflow..
> Perhaps I should try on  lxplus6...
>
> any other thoughts or suggestions welcome.
>
> All the best,
>
> Louie
>
>
>
> [1]
> configure:17164: checking zlib.h usability
> configure:17164: /cvmfs/sft.cern.ch/lcg/releases/LCG_85/gcc/4.9.3/x86_
> 64-slc6/bin/gcc -c -g -O2  -DNDEBUG -I/usr/include conftest.c >&5
> configure:17164: $? = 0
> configure:17164: result: yes
>
> On 23 Apr 2018, at 14:04, Andy Buckley <andy.buckley at cern.ch> wrote:
>
> Hi Louie,
>
> Are you sure that YODA built with gzip support? IIRC it needs to be able
> to find the libZ library at compile time. Have a look in your YODA
> config.log
>
> Andy
>
> *Dr Andy Buckley, Lecturer / Royal Society University Research Fellow*
> Particle Physics Experiment Group, University of Glasgow
> On Apr 23 2018, at 1:59 pm, Corpe, Louie <l.corpe at ucl.ac.uk> wrote:
>
>
> Hi Riveters,
>
>
> I'm trying to use the zipped i/o functionality introduced in Rivet 2.6.0 /
> Yoda 1.7.0.
> I can't seem to get it working: is there an example of how to do this
> somewhere?
>
> I've included a minimal example [1]. Please let me know what I'm doing
> wrong!
> The files I used in [1] can be found on my public on lxplus: /afs/
> cern.ch/user/l/lcorpe/public/RivetZippedIO/examples/
>
> All the best and thanks in advance !
>
>
> Louie
>
>
> [1]
> [lcorpe at lxplus005 scratch]$ gzip -c out1028_DSIDxxx.MEWeight.yoda >
> examples/out1028_DSIDxxx.MEWeight.yoda.gz
> [lcorpe at lxplus005 scratch]$ python
> Python 2.7.5 (default, Aug 4 2017, 00:39:18)
> [GCC 4.8.5 20150623 (Red Hat 4.8.5-16)] on linux2
> Type "help", "copyright", "credits" or "license" for more information.
>
> import yoda as y
> a= y.read("examples/out1028_DSIDxxx.MEWeight.yoda.gz")
>
> Traceback (most recent call last):
> File "<stdin>", line 1, in <module>
> File "yoda/include/IO.pyx", line 107, in yoda.core.read (/afs/
> cern.ch/user/l/lcorpe/scratch/rivet/YODA-1.7.0/pyext/yoda/core.cpp:85809)
> UnicodeDecodeError: 'ascii' codec can't decode byte 0x8b in position 1:
> ordinal not in range(128)
>
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>
>


-- 
Dr Andy Buckley, Lecturer / Royal Society University Research Fellow
Particle Physics Expt Group, University of Glasgow
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