import traceback, sys
try:
    from app.core.refrigerant_loader import RefrigerantLibrary
    r = RefrigerantLibrary('R290')
    print('Loaded Refifc OK')
    try:
        print('pbegin', r.p_begin())
    except Exception as e:
        print('p_begin failed:', e)
except Exception:
    traceback.print_exc()
    sys.exit(1)