dead.py

from cmdstanpy import CmdStanModel
import os
with open("test.stan","w") as f:
    print("""
data {  
}
parameters {
  real A;
}
model {
  A ~ normal(0,1);
  if(1<A)reject("to put some message to stderr");
}
    """,file=f)
os.environ["CXX"]="g++"
stanModel = CmdStanModel(stan_file="test.stan")
fit=stanModel.sample(data={},iter_warmup=100,iter_sampling=10000,show_progress=True) #or show_prgress="notebook"