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# Copyright 2016 (c) Egor Tensin <Egor.Tensin@gmail.com>
# This file is part of the "Simple image filters" project.
# For details, see https://github.com/egor-tensin/filters.
# Distributed under the MIT License.
import argparse
def parse_non_negative_integer(s):
try:
n = int(s)
except ValueError:
raise argparse.ArgumentTypeError('must be a non-negative integer: ' + s)
if n < 0:
raise argparse.ArgumentTypeError('must be a non-negative integer: ' + s)
return n
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