rootpy and ROOT 6.18

Hi! I have recently moved to ROOT 6.18/04 and rootpy has stopped working, returning the following error at import time

In [2]: import rootpy
---------------------------------------------------------------------------
AttributeError                            Traceback (most recent call last)
<ipython-input-2-75756a455cd2> in <module>()
----> 1 import rootpy

/Users/manzoni/opt/anaconda2/lib/python2.7/site-packages/rootpy/__init__.py in <module>()
     29 from .logger import log
     30 # Needed for "from rootpy import QROOT" by other modules
---> 31 from .utils import quickroot as QROOT
     32 from . import defaults
     33 from .base import Object

/Users/manzoni/opt/anaconda2/lib/python2.7/site-packages/rootpy/utils/quickroot.py in <module>()
     13
     14
---> 15 root_module = ROOT.module._root
     16 if hasattr(root_module, 'LookupCppEntity'):  # pragma: no cover
     17     lookup_func = 'LookupCppEntity'

AttributeError: 'module' object has no attribute '_root'

has something changed under ROOT’s hood that makes rootpy crash?

Thanks

[smuzaffar]

although you can disable the new pyroot by using -Dpyroot_experimental=OFF but we would like to move forward with new pyroot and would like to get a version fo rootpy which works with it. Any plans to support the new pyroot? Otherwise I am afraid we have to drop rootpy from CMSSW software stack

[mrodozov]

@zodiacfireworks yes, that’s because ROOT is moving on to new PyROOT for which they have enable building the new libs by default. You can see this comment from ROOT devs https://github.com/cms-sw/cmsdist/pull/5531#issuecomment-590760532 on what has changed. You can also add this cmake flag: -Dpyroot_experimental=OFF to have the old lib version