import sys, traceback

EXIT_SUCCESS=0
EXIT_ERROR=1

def info(message):
    # print info to sys.stderr because it isn’t really output, just debug information
    print("INFO: "+str(message), file=sys.stderr)
    traceback.print_stack()

def warn(message, is_exception=False):
    print("WARNING: "+str(message), file=sys.stderr)
    if is_exception:
        traceback.print_exc()
    else:
        traceback.print_stack()

def error(message, is_exception=True, handle_gracefully=True):
    print("ERROR: "+str(message), file=sys.stderr)
    if is_exception:
        traceback.print_exc()
    else:
        traceback.print_stack()
    if handle_gracefully:
        pass
    else:
        sys.exit(EXIT_ERROR)