Run ROOT on google colab, working with python 3.11 [latest python version on Colab]. More information at https://melashri.net/ROOT

ROOT-Colab.sh

# Step 1: Download the pre-built ROOT tarball from GitHub Releases
!wget -q --show-progress https://github.com/MohamedElashri/ROOT/releases/download/v6.30.04_python11/root_v6.30.04_Ubuntu_Python3.11.zip

# Step 2: Extract the ROOT files
!unzip -q root_v6.30.04_Ubuntu_Python3.11.zip

# Step 3: Install missing system dependencies for ROOT
!sudo ldconfig & apt-get install -y git dpkg-dev cmake g++ gcc binutils libx11-dev libxpm-dev libxft-dev libxext-dev tar gfortran subversion libpython3.11-dev

# Step 4: Remove the tarball to free up space
!rm -f root_v6.30.04_Ubuntu_Python3.11.zip

# Step 5: Install Compatible libssl 

!wget http://archive.ubuntu.com/ubuntu/pool/main/o/openssl/libssl1.1_1.1.1f-1ubuntu2_amd64.deb
!sudo dpkg -i libssl1.1_1.1.1f-1ubuntu2_amd64.deb
!rm -f libssl1.1_1.1.1f-1ubuntu2_amd64.deb


import sys
sys.path.append("/content/root_build/")
sys.path.append("/content/root_build/bin/")
sys.path.append("/content/root_build/include/")
sys.path.append("/content/root_build/lib/")
import ctypes
ctypes.cdll.LoadLibrary('/content/root_build/lib//libCore.so')
ctypes.cdll.LoadLibrary('/content/root_build/lib//libThread.so')
ctypes.cdll.LoadLibrary('/content/root_build/lib//libTreePlayer.so')

import ROOT

h = ROOT.TH1F("gauss","Example histogram",100,-4,4)
h.FillRandom("gaus")
c = ROOT.TCanvas("myCanvasName","The Canvas Title",800,600)
h.Draw()
c.Draw()

When i try to import root_numpy it gives me

Thank you!

There are several problems

1- You didn't install root_numpy
2- root_numpy is not part of ROOT and is a separate software
3- It is unmaintained for years now and not will work with new python version (certainly not on Colab)

So you shouldn't use it but work with PyROOT which is the python wrapper of ROOT that this installs.