RDataFrame verbosity level AttributeError

ROOT
1

HI! I just tries to increase the RDataFrame verbosity level with the experimental feature by doing:

verbosity = ROOT.Experimental.RLogScopedVerbosity(ROOT.Detail.RDF.RDFLogChannel(), ROOT.Experimental.ELogLevel.kInfo) ´´´
 
And it shows an error: 

``` AttributeError: <namespace cppyy.gbl.Detail at 0x64e3ab8> has no attribute 'RDF'. Full details:
  type object 'Detail' has no attribute 'RDF'
  'Detail::RDF' is not a known C++ class
  'RDF' is not a known C++ template
  'RDF' is not a known C++ enum ´´´

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_ROOT Version: 6.24/06 
_Platform: linuxx8664gcc
_Compiler: (GCC) 4.8.5 20150623 (Red Hat 4.8.5-44)
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2

Hi @imanol097 ,
the invocation is correct (I can run that code fine).

Can you run the corresponding C++ code in the ROOT prompt?
What if you first instantiate an RDF object?

Cheers,
Enrico

4

Hi @eguiraud ,
The corresponding C++ code runs well in the ROOT prompt.

In Python running the command after loading RDF object gives the same error as before

5

Hi @imanol097 ,
I can reproduce the problem on lxplus. I am not sure what the cause is, it looks like a bug in PyROOT (cc: @etejedor ).

However if I pick an LCG release instead of the system installation of ROOT things are fine:

[eguiraud@lxplus771 ~]$ python
Python 2.7.5 (default, Nov 16 2020, 22:23:17)
[GCC 4.8.5 20150623 (Red Hat 4.8.5-44)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import ROOT
>>> verbosity = ROOT.Experimental.RLogScopedVerbosity(ROOT.Detail.RDF.RDFLogChannel(), ROOT.Experimental.ELogLevel.kInfo)
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
AttributeError: <namespace cppyy.gbl.Detail at 0x5db9400> has no attribute 'RDF'. Full details:
  type object 'Detail' has no attribute 'RDF'
  'Detail::RDF' is not a known C++ class
  'RDF' is not a known C++ template
  'RDF' is not a known C++ enum
>>>
[eguiraud@lxplus771 ~]$ source /cvmfs/sft.cern.ch/lcg/views/LCG_101/x86_64-centos7-gcc11-opt/setup.sh
[eguiraud@lxplus771 ~]$ python
impoPython 3.9.6 (default, Sep  6 2021, 15:36:22)
[GCC 11.1.0] on linux
Type "help", "copyright", "credits" or "license" for more information.
r>>> import ROOT
>>> verbosity = ROOT.Experimental.RLogScopedVerbosity(ROOT.Detail.RDF.RDFLogChannel(), ROOT.Experimental.ELogLevel.kInfo)

Maybe it’s a Python 2 vs Python 3 thing? It is likely that upgrading to a platform with more recent software will fix this issue, as we typically don’t see the problem on the platforms where we test ROOT.

Cheers,
Enrico

6

Hello,

You need to do ROOT.ROOT.Detail. instead of ROOT.Detail, since it seems there is a Detail namespace under the global namespace (which does not have the RDF attribute). In such a case, to use ROOT::Detail from PyROOT, you need to do ROOT.ROOT.Detail.

Cheers,
Enric

7

Thanks @etejedor . It works now.

8

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