[Rivet] Using zipped I/O

Corpe, Louie l.corpe at ucl.ac.uk
Mon Apr 23 14:58:26 BST 2018


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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