This only allows you to view the root file generated by python, not C++. Here is the root file generated by c++.

[Esword618]

This only allows you to view the root file generated by python, not C++. Here is the root file generated by c++.

guan.root is generated by pyroot, guan1.root is generated by C++.

analy.zip

pyroot code

from ctypes import c_double, c_int
from ROOT import TFile, TTree,TCanvas
guan = TFile("guan.root", "recreate")

ming = TTree("ming", "This is my first tree")
i = c_int(1)
a = c_double(2.2)
b = c_double(0.0)

ming.Branch("i", i, "i/I")  # "i" 为分支的名称，i为地址（c_int本身就是地址）,"i/I"为i的类型
ming.Branch("a", a, "a/D")
ming.Branch("b", a, "b/D")

for j in range(100):
    i = j
    a = i * 0.1
    b = a * a * 9
    ming.Fill()

ming.Write()
ming.Scan()

C++ code

TFile *guan = new TFile("guan1.root","recreate");
TTree *ming = new TTree("ming", "This is my first tree");

int i = 1;
double a = 2.2;
double b = 0.0;

ming->Branch("i",&i,"i/I");
ming->Branch("a",&a,"a/D");
ming->Branch("b",&a,"b/D");
for(int j=0;j<100;j++){
    i=j;
    a=(double)i*0.1;
    b=a*a/3;
    ming->Fill();
}

ming->Write();
ming->Scan()

As you can see, I use the Scan function in both pyroot code and C++ code, but I found that connecting jupyter lab in wsl with vscode in windows will cause a stuck state, have you ever encountered it? If you do, I hope you can tell me how to solve it.