Noisy warnings when using Experimental features

[acampove]

Check duplicate issues.

• Checked for duplicates

Description

I am seeing warnings complaining about some Experimental.Distributed imports, but I am not importing that myself.

Reproducer

import warnings
import traceback

def warn_with_traceback(message, category, filename, lineno, file=None, line=None):
    traceback.print_stack()
    print(f"{filename}:{lineno}: {category.__name__}: {message}")

warnings.showwarning = warn_with_traceback

import ROOT
ROOT.RDF.Experimental  # ensure DistRDF proxy object is loaded into sys.modules
from XRootD.client import File

ROOT version

---

| Welcome to ROOT 6.38.04 https://root.cern |
| (c) 1995-2025, The ROOT Team; conception: R. Brun, F. Rademakers |
| Built for linuxx8664gcc on Apr 08 2026, 08:58:39 |
| From tags/6-38-04@6-38-04 |
| With std202002 |
| Try '.help'/'.?', '.demo', '.license', '.credits', '.quit'/'.q' |

Installation method

micromamba

Operating system

Almalinux 9

Additional context

Name: xrootd
Version: 5.9.2
Summary: eXtended ROOT daemon
Home-page: https://xrootd.org
Author: XRootD Developers
Author-email: xrootd-dev@slac.stanford.edu
License: LGPL-3.0-or-later

[pcanal]

What is the ouput/warning you actually see?

[acampove]

What is the ouput/warning you actually see?

In ROOT 6.36, the ROOT.RDF.Experimental.Distributed module has become just ROOT.RDF.Distributed. In the                                                                               
future, the 'Experimental' keyword will be removed, so it is suggested to move to the stable API in user                                                                              
code. You can now change lines such as:                                                                                                                                               
'''                                                                                                                                                                            
connection = ... # your distributed Dask client or SparkContext                                                                                                                       
RDataFrame = ROOT.RDF.Experimental.Distributed.[Backend].RDataFrame                                                                                                                   
df = RDataFrame(..., [daskclient,sparkcontext] = connection)                                                                                                                          
'''                                                                                                                                                                      
to simply:                                                                                                                                                                            
'''                                                                                                                                                                              
connection = ... # your distributed Dask client or SparkContext                                                                                                                       
df = ROOT.RDataFrame(..., executor = connection)                                                                                                                                      
'''                                                                                                                                                                             
                                                                                                                                                                                      
  warnings.warn(msg_warng, FutureWarning)  

[silverweed]

Two additional pieces of information:

1. this happens also in ROOT master
2. this happens regardless of the relative order of the last 3 lines in the reproducer