def get_buildroot():
  try:
    return BuildRoot().path
  except BuildRoot.NotFoundError as e:
    print(str(e), file=sys.stderr)
    sys.exit(1)
Returns <n|alpha> for the coherent states of 1D harmonic oscillator.
dataset/ETHPy150Open pantsbuild/pants/src/python/pants/base/build_environment.py/get_buildroot--crossover with--dataset/ETHPy150Open sympy/sympy/sympy/physics/qho_1d.py/coherent_state