def check_output_file(filename):

    if os.path.exists(filename):
        raise CommandError("File already exists: {}".format(filename))
Return *True* if *x* is integer-valued; otherwise return
dataset/ETHPy150Open hellerbarde/stapler/staplelib/iohelper.py/check_output_file--crossover with--dataset/ETHPy150Open fredrik-johansson/mpmath/mpmath/ctx_mp_python.py/PythonMPContext.isint