Python 2.7 error import ROOT

Question

I installed root.exe in the folder C:\root_v5.34.36, folder C:\root_v5.34.36\bin which contains ROOT.py

When I started a Jupiter Notebook (anaconda), I write :

import sys
sys.path.append("C:\root_v5.34.36\bin")

Then

import ROOT

And it displays :

ImportError                               Traceback (most recent call last)
<ipython-input-2-b332e25ada1f> in <module>()
----> 1 import ROOT

ImportError: No module named ROOT

What's wrong?

do you have a file `__init__.py` in the directory where `ROOT.py` is? — fedorqui, May 04 '16 at 09:27
try `sys.path.append("C:\root_v5.34.36\")`. Or you should get the right dir. — GoingMyWay, May 04 '16 at 09:27
@fedorqui no, just the folder bin which contains lot of .dll, .py etc... — eleicht, May 04 '16 at 09:31
Check : [this](https://root.cern.ch/phpBB3/viewtopic.php?t=17414) — Ani Menon, May 04 '16 at 09:41

score 2 · Accepted Answer · answered May 04 '16 at 09:27

2

Try changing the root bin path to sys.path.append("C:\\root_v5.34.36\\bin")

answered May 04 '16 at 09:27

Noe Fernandez

114
1
4

Seems to be the solution, thanks! Right now, I've got new problem... "ImportError: DLL load failed: %1 isn't a valid win32 application." – eleicht May 04 '16 at 09:33
Check this : [ImportError: DLL load failed: %1 is not a valid Win32 application. But the DLL's are there](http://stackoverflow.com/questions/19019720/importerror-dll-load-failed-1-is-not-a-valid-win32-application-but-the-dlls) . It seems to be the same problem – Noe Fernandez May 04 '16 at 09:47
Find an easier way => install anaconda 32 bits on my 64 bits OS, thanks! – eleicht May 04 '16 at 09:58

score 0 · Answer 2 · answered May 09 '16 at 10:51

You need to run the file thisroot.bat usually found in the config folder of the ROOT directory before starting the notebook application.

This should be done by opening a powershell and typing:

cd  C:\root_v5.34.36
.\config\thisroot.bat
C:\WhereverTheJupyterNotebookApplicationIs\JupyterNotebook.exe

Python 2.7 error import ROOT

2 Answers2